the thing is, Nintendo is finally committing 100% to connectivity as an entire package.  GBA and DS connectivity never went anywhere, because they never committed to it.  Sony will, much like how they did with PS Move, try to tack on the latest fad to the PS3.  I imagine that Microsoft will have Windows 8 tablets interface with Xbox 360 now too.  It may be better tech, but it only works if everyone has it from the beginning.