This has been brought up on a couple different forums already. Generally consensus amongst us "power users" is that our driveways are all too big and we don't want to mess with battery charging and eventual replacement. I do agree that it seems like a good product in theory though.
May be good for short drives and for areas that usually get small snowfalls. But the $1800 price is a bit much for something that only works for an hour. I also wonder just how well it would handle 12" or more of heavy wet snow. It would not work for me as it takes me 2-3 hours to clear my drive & side walk.