Legend11 on 21 December 2008
I think it's a very safe prediction to say that both Microsoft and Sony will have motion controls in their next system. There's no way they're going to leave that segment of the market to Nintendo, it makes absolutely no sense to do so.
That being said I also think that at least in Microsoft's case it'll attempt to use the same tricks it did this generation in neutralizing it's main competitor's advantage. That being to offer the same experience at a substantially lower price, releasing a system before the competition (likely in 2011), and to continue to come up with new ways to make Xbox Live more compelling.
