they will add a hardware upscaler. bundle wii motion plus, and HDMI cable. s
the wii as it's now it's not capable or really outputting 720p, u know even the 360 manage to do that all the time because of 10mb (512mb shared ram) isn't enough for a 720p
it's not a easy "accesory" upgrade, it will require abit more than adding ram, like they did with n64.
most of the games can't be ported to the wii without making them from zero. ie making them again, having wii capabalities in mind.