Nope. Both consoles are more or less the same and each can be extended equally as needed so it's impossible on both sides really so technically neither can 'out proof' the other.
What you're speaking about is sales bumping tactics around new features, prices, etc. MS have done a great job here but arguably no better than Sony. Last time this year the PS3 was ahead due to the re-design/price this year it's the 360 next year it could be either.
Coupled with a recession and other factors it was clear this gen was going to extend and each console was going to see various feature refreshes.
Heck, if Sony want they could release an Eye2 that is close to or matches Kinect features, MS could release a Blu-Ray external player if they decided that was needed.
So I'm going to say False.
MS have pulled off a nice boost in US with Kinect, no doubt about that - but worldwide it's more or less matched by PS3 baseline demand vs lower 360 baseline demand so I see no sign of any better 'future proofing'.
Try to be reasonable... its easier than you think...
