Dumbest idea ever. The hyper-fit guy sitting in the gym isn't looking too bad, though having the knees rotated that far out for any length of time isn't going to work out well. (Yes, knees-out squatting and knees-in squatting are very different things.) The woman in the second picture has the same problem, plus hyper-extending her arms and bending her wrists too far back. The third woman . . . oh, I don't even know where to start with that one. None of them are doing their vision any favors being that far from the screen, either. There's a reason they only picture twenty-somethings.
I love squatting. I have ever since I was a child, and people have often commented on my tendency to squat when others would stand or sit. I also use a standing desk. Nonetheless, there's just no way whatsoever that squatting while using a computer seems like a good idea.