These aren't just trackpads, as people who have used it have said many times already in the thread. You are wrong if you're thinking these are like playing a shooter by sliding your thumb over a laptops trackpad. They are much more sensitive for one thing (if you DO want to control it that way) and there are options to give the pad simulated inertia like you're using a trackball that you can actually feel moving under your thumb.
People in this thread have already said that they are able to get comparable results from this controller as they did using a keyboard and mouse.
If you want more details look at Krejlooc's post a few pages back:
http://www.neogaf.com/forum/showpost.php?p=166457288&postcount=445
And I'm pretty sure these touch pads can be configured so that they work like an analog stick (pressing in to the right or left so the camera pans to the right or left), and impressions of the d-pad have actually been decent too (due to the haptic feedback again and the fact that the pads actually depress like buttons).