The challenge with this position is that while the ergonomics are correct, the upper body will inevitably tire and begin to sag, causing either a forward lean (giving that "Gameboy back" feeling in the shoulder blades) or sagging elbows, which can lead to carpal tunnel issues. A better setup that could effectively last for many more hours would be a standing version of this:
If your desk isn't set up like this I would encourage you to try it sometime.
So is the issue with Veradesk photo that the platform is not high enough and the guy's elbows need to be closer to 90 degrees?