Next console gen I'll probably just buy the Sony and Microsoft offerings. The only use my Wii gets is a few old retro nintendo and super nintendo games in addition to netflix. I never found a single actual Wii title I liked enough to warrant a purchase of round 2.
I doubt Wii will get any new software once Wii U is out. I think your only alternative might be the PlayOn software, but I have no experience with it and it requires your computer to be on at the same time.