Wii - yes. Pretty much a given.
PS3 - maybe. Requires it to get a decent tail outside core markets in the same vein as PS2, however given this worked for PS2 and Sony still seems to sell better in those markets it's not impossible. I reckon though it's unlikely. The PS3 outside US/Japan has been on the market for less time than the 360 too which could help it appeal as "newer" in emerging markets, particularly with Blu-Ray for media playback.
360 - probably not. The 360 seems too focused on Western markets and I'm sure that demand will drop off sharply once next Xbox is out. If MS really continue to support the console for a long time then I guess there's an outside chance but 360 seems to me to have the least chance. It just feels like it doesn't have enough to offer in emerging markets (weak Live, limited additional services, only plays DVD, etc) plus less brand recognition in those markets.
Try to be reasonable... its easier than you think...
