I wonder the same thing. But I would be really interested in trying a small Mac Air sized screen/keyboard shell that had a port that I could slide such a phone in to. Sort of a portable docking station.
Our code runs fairly well on the Nexus 4 today, and through much dogfooding, we've learned that RAM is the biggest limiting factor in performance. So when (if?!) Edge ships with 4GB of RAM, the desktop mode will fly.
Honestly, I'd probably fund this project right now if they had a tablet or notebook docking accessory in the plan.