Who do you think is most likely to enter the console market?

[mrstickball]

Apple is already in the market.

They don't need any other devices than what they have now. The iPods and iPhones are already eating into Nintendo's market share.

Apple is outshipping Nintendo and Sony combined for handhelds, so why would they bother with another device?

Of course, you have Google too, which has Android and that will become a larger market in the future - Robo Defense is going to sell ~20,000 copies this month which shows it'll become a strong platform in the future.