Yeah I agree, but I'm looking at it from their viewpoint. Not mine or yours. I can see them justifying the use of only 4GB. The concerns of PC gamers have no relevance to MS and their console roadmap.
I'd prefer to see a console on par with my desktop but they're not about to add 24GB of RAM. No game can utilise that and since I highly doubt the next consoles will be 64bit I can see them sticking 4gig in there.