That's quite an 'if'. Your proposition assumes that DD will be a key factor in competition, when it hasn't been much of a factor at all so far. DD will take over when customers want it to happen. If it comes to that, Nintendo will step up, but we're nowhere near it yet.
A game I'm developing with some friends:
www.xnagg.com/zombieasteroids/publish.htm
It is largely a technical exercise but feedback is appreciated.