I also see a problem in that I can't picture Sony fanboys being as devoted as Nintendo ones were during the hard times. I think the Sony's will be more apt to jump ship.
EDIT: Lost Planet sales seal the deal for me. DMC 4 will be on 360. Capcom's base IS 360 now. There is no doubt about it.
1 360 LOST PLANET: EXTREME CONDIT 329,3412 PS2 GUITAR HERO 2 W/GUITAR 224,024
3 360 GEARS OF WAR 212,209
4 WII WARIOWARE: SMOOTH MOVES 201,249
5 WII LEGEND OF ZELDA: TWILIGHT P 188,858
6 PS2 MADDEN NFL 07 155,940
7 GCN LEGEND OF ZELDA: TWILIGHT P 143,572
8 PS3 RESISTANCE: FALL OF MAN 143,502
9 360 TOM CLANCY'S RAINBOW SIX: V 135,099
10 NDS NEW SUPER MARIO BROS 125,184
11 NDS BRAIN AGE: TRAIN YOUR BRAIN 95,143
12 360 CALL OF DUTY 3 83,894
13 WII RAYMAN RAVING RABBIDS 81,094
14 360 LOST PLANET: EXTREME CONDIT 79,33215 PS3 MADDEN NFL 07 75,244
16 PS2 WWE SMACKDOWN VS. RAW 2007 73,084
17 NDS NINTENDOGS: DALMATIAN & FRI 72,549
18 PSP GRAND THEFT AUTO: VICE CITY 71,866
19 NDS YOSHI'S ISLAND 2 71,807
20 PS2 FINAL FANTASY XII 69,784
21 XBX HALO 2 69,588
22 NDS MARIO KART 69,233
23 360 MADDEN NFL 07 68,771
24 NDS POKEMON MYSTERY DUNGEON: BL 68,702
25 PSP MADDEN NFL 07 68,648
26 PS2 NCAA MARCH MADNESS 07 68,524
27 PS2 GRAND THEFT AUTO: SAN ANDRE 68,077
28 NDS HANNAH MONTANA 68,059
29 PS2 NEED FOR SPEED: CARBON 65,297
30 NDS NINTENDOGS: DACHSHUND & FRI 65,135
So 400,000+ for Lost Planet. Capcom is doing very well with the 360, and once they start seeing the lackluster PS3 software sales (just look at that list) they'll make the right decision.
There's no way Sony fans will be as loyal as the Nintendo fans were during the N64/GC days. Nintendo fans actually have an emotional, vested interest in Nintendo products - software and hardware. They remember the first time they played Mario, the first time they saved in Zelda, etc. Sony fans don't have that because most of their favorite Playstation games were not Sony based. They remember games like Metal Gear Solid and Resident Evil, games which either might move to the 360 or already have. Sure there's Final Fantasy still (for now), but even Dragon Quest has moved to the DS.