I would love to see an updated Surface RT - it desperately need something better than a Tegra 3, since that is really the only thing holding back the existing RT OS.
The move to an 11.6" Surface with AMD may not necessarily be a great move. 11.6" screens tend to be overly wide (when in a 16:9 or 16:10 aspect ratio, as is the case with almost all 11.6" screens these days) and not very moveable. Samsung has one out right now that I played with, and overall it doesn't seem to be the right form factor for documents/note-taking, as it's not wide enough when in portrait orientation. Additionally, AMD processors are nowhere near as power efficient as Intel CPUs (stems from the architecture, circuit design, and even the materials used in the chips). Most people expect about ~8 hours from a laptop/tablet these days, and I don't think AMD is going to get them there.
I'm not saying my opinion is an end-all-be-all, but in my eyes the Pro 2 moves this article outlines don't sound very logical.