The gaming consoles will all follow into the PS3's ideals - entertainment hub with integrated full gaming support. Basically, buying a console will be like now, but even more refined with instant playability out of the box, unlike xbox arcade which needs hard drive or wii's limited memory (correct me, but does wii even have a hard drive?)
The PSP2 is already under development, and xbox portable is also going to be released at about the same time i guess. That brings the console into two distinct categories; heavy-weight and portable.