Having an analogue stick as well as trackpads seems kinda counterproductive considering what they are trying to achieve here. The problem that arises from this is that you will end up with one useless input method. Whether it is the analogue stick that cannot be used for anything, or a trackpad where buttons can be assigned to it, but a set of physical buttons would be superior. Whilst I have not used a Steam controller, I don't really see what they are trying to achieve here. Sure, analogue sticks aren't very good for precision, but trackpads aren't exactly the pinnacle of accuracy either, and in the cases where a trackpad would be superior to a traditional analogue stick (FPS?, mouse controlled UI, etc), the trackpads would still suffer where analogue sticks work well (Driving and brawler games), and even if trackpads worked somewhat well, there is no way in hell that I would want to bring a Steam controller into a competitive environment against someone with a mouse and keyboard. Nonetheless, I would like to try one out for myself, but as it stands, it doesn't really look like something that will catch on.