I noticed this article doesn't say that this X1-2 will not have exclusive games. It just says that it will run all X1 games. I'll be curious to see what policies Microsoft announces. If there are exclusives, this sounds like a new generation.
I could see this machine being a 4k X1, though, and not getting anything too special. The "more than 4x" power seems perfect for getting those 1080p/900p X1 games running at 4k.
But why announce this system 1.5 years early? This article makes it seem like they feel threatened by PS4k. If it's iterative like PS4k but releasing next year, they could hurt their sales until it releases. If it's a new console generation, though, then why feel threatened by PS4k and not PS5? I feel like this announcement is only going to make them lose this holiday even more. But maybe it'll help them win 2017? Only announcing a cheap slim sounds like the best strategy to me.