um. methodis is... right?
basically, everyone probably guessed the situation with smartphones/handhelds in each of the major reasons, so they behaved accordingly. for what it's worth, i don't feel like the 3DS is getting great support either, probably because after a few high profile splatters, everyone knows it's a one-market system.
For this year in Japan, 3DS will get
Dragon Quest VII
Ace Attorney 5
Shin Megami Tensei 4
Monster Hunter IV
Layton 6
Yokai Watch
+ other mid and low profile releases...that's a pretty good third party support in my opinion. And most of the highest profile titles + some of the low profile (Kaio) will be released here too.
About the future, 3DS is selling too much in Japan, both with hardware and software ( especially third party one) to be ignored by Japanese companies. We'll probably see some brand new announcements soon. Even announcements that can be good worldwide ( not giant sellers, but good sellers), since the only flop so far in the West has been Resident Evil: Revelations, while KH3D is doing rather decent in US and will continue to sell in the future and that has been the biggest Japanese third party release in the West by far: using games like Theatrhythm to judge 3DS's third party performances is like using Atelier games to judge PS3's possibilities of selling games, not so useful. Especially when Angry Birds and Sonic do pretty well, Lego titles continue to sell a lot through time, Epic Mickey:PoI being the second best selling SKU ( it's not a 3DS problem if the brand lost so much appeal after the first title) and TotA did very near to the original on PS2 despite initial shortages. Many 3DS titles are having legs, and they will continue to sell next year too: it's how handheld titles work, with some exceptions obviously, like very very niche titles with limited shipments. To note: I'm not saying those third party sales are amazing / are having DS-like-legs, however. Lego titles, for example, could sell more (especially if DS SKU is not a factor anymore, and possibly it'll be the case next year), or KH3D would have sold better in the past (I feel KH brand has slowed down big time too, especially looking at Japanese sales), but I can perfectly say they're fine now overall. I don't think people were expecting things like Code of Princess at over 100k or things like that, I hope at least
But I can't feel so positive about Wii U: right now there's just one certainty for the next months, that 3rd party support will be very lacking and Nintendo launch titles are not able to boost sales. Sales have flattened all around the world, especially in Europe where they're pretty tragic looking at charts with no Wii U titles in top 40s / top 10s. I certainly wasn't expecting such a market's rejection like Wii U is having. It resembles a lot Vita right now...the only difference is that Nintendo titles will come, but still.