My Steam Controller arrived...
Interesting device it is. I grabbed it when they went on sale for $5.
I tried playing Cities Skylines with it, and while it'll take getting used to, it was perfectly doable.
Curious how it'll work in other games.
EDIT: After messing with it for a bit, I've found that this thing is perfect for controlling an HTPC from the couch or something. The mouse controls work great, and I'm sure I'll be able to type reasonably quickly on the on-screen keyboard with some practice.
Now I wish I had grabbed more than one... Oh well, maybe some other company will pick up the concept and do something with it.