For games like Trine I'd much rather have a good gamepad. While I usually hate trackpads and their kind, somehow, of all the things Valve announced, I feel like this will benefit me the most.Nice in theory,but I don't see people giving up the keyboard/mouse combo for this controller.
There are some articles on gamasutra from devs who have had a go, most of them seem to like it well enough.Finally. A company had some foresight to get away from the silly analog stick; these touch pads should give a lot nicer control of the game. Looking forward to the user experience reviews of the beta testers. One way or another, this should be interesting.