Yeah, right. So if games get more demanding and need every bit of power Xbones OS will reduce features? Talking about the definition of future proof.
What do mean Xbox OS will reduce features? The 3GB is locked. No matter how demanding a game becomes, they'll have to fit in 5GB RAM footprint. I don't know what Microsofts plans are, but having a big space for OS purposes allows them to be more flexible. Who knows where Windows RT/ Windows Phone 8 and Windows 8 kernels will go, who knows what the latest trends in mobile space will be. The whole point of the 3GB reserved is to have something to fall back on of in the future some unexpected features appear. The Xbox 360's OS is roughly just as capable now as it was in 2005. Microsoft have stated multiple times they want to be able to add new features to the Xbox One OS without the limittion of RAM.