I see a bunch of other randomly useful things with this. Since it's got some kind of motion sensor in it, you could turn it into a makeshift security system.

Since I'm part of the apparently small minority of people who know how to program a thermostat, I don't expect it would save me a lot of money, but I'd probably still buy it for all the other neato features, like being able to pull our your phone when you're heading home early from work and have the air ready by the time you get home.

As to the 7-day learning thing, I'd probably never have the patience for that. I'd just pre-program it with the same schedule that I programmed into our current thermostat and then let it do its automatic adjustments from there.