That's really the larger point here. The 360 controller is the standard now, trying to improve upon it when the market is already flooded with that style contro

That's really the larger point here. The 360 controller is the standard now, trying to improve upon it when the market is already flooded with that style controller would be a losing battle for Valve. They decided to take a risk and innovate, but it was pretty much their only viable option if they wanted to enter the controller market.