Sega is giving a lot of support to the PS3 as well .Yakuza 3 for instance .Golden Compass ,Iron Man ,Imabikisou (published by Sega ) ,etc etc .I am not saying it will go to PS3 ,but the link doesnt say a word about format .

In my book

BR=Massive storage for lenght ,audio ,scenarios,etc=Good for RPG .
Wiimote=motion sensors for some gimmicks as in Folklore=Not very good for RPG ,specially coupled with a 2003 graphics chip and proccesor .

Golden Compass and Iron Man are on all systems. The Wii has gotten a lot of support from Sega. NiGHTS, Sonic & Mario, Bleach, Doraemon, Ghost Squad, Shiren the Wanderer 3, Sonic and the Secret Rings, Super Monkey Ball: Banana Blitz, and Samba de Amigo are all Wii exclusives.  The Wii also has all the multiplatform Sega games.  If there is any company that supports the Wii overwhelmingly more than the 360 and PS3 it's Sega. The only game the Wii is really missing from Sega is Virtua Fighter.

Also, the previous game was exclusive to the GC (after the DC died anyway). I can't think of any GC exclusive games that have gone to the PS3 or 360. Tales of Symphonia is a recent example of a GC RPG with a Wii sequel. As far as Blu-ray increasing game length, many GC RPGs used multiple discs. The Wii can do the same if necessary.