Valve Teases Redesigned Steam Controller With D-Pad And Standard Buttons
“These prototypes incorporate much of the testing feedback we have received so far and the changes that were announced at Steam Dev Days,” reads the post. “Even though our limited internal play testing has been going really well, we're excited to get some feedback from our customers on these latest changes.”

Above: new controller; below: old controller
As you can see, the changes from the original are substantial. For starters, the touchscreen is gone, replaced by two small buttons flanking a glowing Steam logo. The thumb pads are the same, but the standard ABXY buttons have been moved from the area occupied by the former touchscreen and placed in a more standard configuration across from four directional buttons. Also note the L/R triggers on the front (or top, depending on your point of view) of the controller.
Valve is still gleaning feedback from users, so the design isn’t technically finalized.