I think "we" as a community will be unable to demonstrate any powerful developments on any console unless we start forming some more teams of our own. Making uses of what resources we have, whether it be common geographical location, or internet based.
I think the reality is, for now, a group of individuals may be able to purchase a Wii devkit collectively and start active development pursueing a publisher, but as for homebrew for all, still unlikely. I bet microsoft will take similar steps if not the first steps towards opening it up by including some minimal support for Xbox360 in an SDK.
I would like to get together and freelance a game for the Wii, try to sell it myself/group over the internet instead of market it in-store, and see if its possible.