800x480 on an external screen?! Not enough pixels!
The LCD on the rear of current model DSLRs provides 640x480...
For $500, you get an extra 2 inches but only an extra 160 pixels wide?
In addition to the power switch issue, I think that it's worth waiting for them to deliver the next model with specs that make it actually worthwhile having externally.
At 5", the screen should be at least 1024x768.
Right idea, but not yet ready.