"That means if games start supporting these resolutions there is no need to buy ps3 and 360 for hd gaming."
Oh my god where do these guys come from? A PC from 1980 would have been able to support 1080p. (Perhaps he would have only painted one polygon per hour but who cares 1080p Woohooo)
When do you get it the resolution alone doesn't mean shit. Even the Ps3 and 360 which are 10times more powerful than the Wii mostly use 720p because the images they can compute for 720p look better than a potential 1080p game with fewer pixel-render operations.
If you want gorgeous HD graphics buy a 360 or a PS3, if you like the motion controls of the Wii buy a Wii but please think before you write.
//rant off