I hope they do! I'm waiting to buy one but I cannot bring myself to pay for one. My original RT is at times painful just browsing the web but it's still very good and functional.
I've had one for a while and never had it overheat. There was something about the thermal warning kicking in on the core I7 but I seem to remember that was a firmware issue flagging the warning to early rather than an actual overheating problem.They do look nice. I think by the time the surface pro 4 comes out, with that new type of processor, they'll be pretty good.
At the moment ive just heard too many overheating stories.