The FCC has just made public some exhibits for the left Steam Frame controller (via SadlyItsBradley). We've known the FCC ID 2AES4-1013 refers to the left controller for the upcoming Valve VR headset for a while, but we now have iFixit-style teardown pictures of it, courtesy of Valve itself.
Things could presumably still change, but the main takeaway is that it looks like the controller could actually be pretty repairable.