PS4 = Definite. They have always maintained that PlayStation would be sequential.
Xbox XMC = idea from above. XMC = Xbox Media Center = FTW. Great idea. Brings home all of their divisions in one box. Also, by then Vista will be fully replacing XP and the inter-relationship of your PC w/ xbox will be fully on.
Nintendo is a little harder. I think that they will want to keep Wii in the name to help non-gamer/super casuals who have purchased the system. But, they will want to stress that it is different, better, more there. They also want to keep is short and simple, one of the major reasons why they chose Wii in the first place. My guess WiiHD. Since I see them keep 100% of the features in Wii but adding to the power/abilities.











