I dunno, the game looks crappy regardless AA or super resolution or not. I mean it animates well, but I'm surprised Capcom isn't doing a Wii port since the visuals wouldn't take much of a hit.
It's more detailed than it seems, and the animation is amazing. And having seen this game squished into a non-HD 4:3 cab in the arcades, it ain't pretty that way.

I think they could do a scaled-down version too. Fuck Wii though, I'd want a PSP version.
Online is always better on X360, but I can't say I've had any lag playing people on the PS3 even when the bars are low, so it's perfectly acceptable.
Is there any reason you got this on PS3 over 360? Controllers?
but you can set a shoulder button to do those things
They are not as responsive as they should be, ESPECIALLY the triggers. I am making due with the standard six axis right now by using the two shoulder buttons for medium kick and punch. It's responsive enough that I can get out the focus attack every time when I need it. The triggers are set to 3P and 3K. I find it easy enough to do 3K with just the face buttons and shoulder button, and 3P works well enough when I need it (for who I play that's pretty much just Zangief).
But I am still having a more difficult time playing it with the standard pad versus the Mad Catz pad, no question. I am still winning but losing a lot more life due to fuck-ups with the controller...when I want to do a move in the middle of a match, sometimes it won't come out as easily as it does with the fight pad. Add lag and it creates problems.
Pad or stick preferences aside, SF4 NEEDS a six button face layout. It's just not meant for triggers/shoulder buttons. You can't set everything to one button because you NEED to be able to do 3P, 3K, throw, and focus attack easily. That leaves you with two extra buttons, best served for 3P and 3K, on a standard controller.
In some of the previous SF home ports, they simplified things and made it so you only needed two buttons instead of three to do moves like Zangief's lariat, but they can't do that now because of EX attacks. I do wish that they took a page out of HD Remix and simplified some moves to make it easier to play with a standard pad. This and the lack of any kind of real training mode (it doesn't show you how to do anything, not even demos in the challenge levels, WTF?) are my biggest complaints with the game. (Next would be the lack of new characters)
Seth is pretty fucking cheap at times, and at other times, he's really easy.
You just gotta figure out which attacks take him down. There's always a pattern that works for everybody, and may just be basic punch and kick stuff, no specials. For example I am not a Dhalsim player and had the HARDEST time beating him. Just wanted to clear it with everyone to get Seth. Anyway, here's what worked:
Round 1- Spam the shit out his hard punch spear (down and punch), land and immediately do headbutt (back and hard punch). Worked every time, I was perfecting Seth's cheap ass.
Round 2- This is where it took me a bunch of tries. In the end? Spam standing and jumping hard punches, and hard kicks. Dhalsim can also dash right under his Sonic Booms. The end. I beat the game with 'Sim the first time when I got the PS3 version today.

I hate be one of those "shoto scrubs" that people over at GAF complain about, but Ken has always been my favorite character to use. I played some guy online and beat him six times in a row. It's not like I'm good or anything, but I wondered why he didn't log off, he just kept coming at me and getting killed.
There's nothing wrong with using Ryu or Ken if you play them WELL. It's the guys that just pick them and do nothing but FB FB FB FB FB FB FB DP FB FB FB DP SWEEP SWEEP SWEEP JUMP KICK SWEEP DP FB FB FB FB that people are hating on. It's boring as fuck fighting them, and if they're low-ranked (likely have 0 BP), you don't get jack shit for beating them once you have enough BP in ranked. I only enjoy it when it's some trash-talking distinguished mentally-challenged fellow that you just murder, and watch as they scream and bitch the whole time.

But one definite weakness with Ryu and Ken, perhaps more than any other character, is that because they are so popular, they are also much more predictable.
For you guys just getting into this game or back into fighters after a long time, one piece of advice I can give you that will work WONDERS against these "shoto scrubs" is to simply
NOT JUMP. Just walk up to them and be amazed as they do endless dragon punches, which you will block or avoid, leaving room to punish them for this over and over and OVER again. It's uncanny that after all these years, some people just cannot fathom another player not jumping into their "invincible" dragon punch.