Here is Nate Hoffelder:
Here is Mike Cane:
It'll be interesting to see what shows up. I suspect it'll be a lot more boring than new screen technology (a switch to Pearl seems more likely than a switch to Mirasol or something even less discussed -- I'd be surprised to see it go all touch, honestly, but you never know).
ETA: fjtorres in the comments suggests: "The WiFi only version will be closer to $100 than $150."
I find this highly plausible in the wake of the Kobo announcement.