It's not of use now.. but I'm learning Qt/C++ at the moment (not from scratch, or else it would take ages :P) and I've planned on creating solutions for this, which are:
- Pocket recognition, by using the front camera and the proximity sensor. If it's dark and closeby, it's probably a pocket :P lock screen/keys in that case, of course.
- Save/restore desktop layout

You could state that help is on the way hahah but that might take a while..