I think there are a lot of ways for users to end up in unexpected situations (sitting too close, camera too low, etc).
When the controller was first plugged in, I was in Life with Playstation. The Move help screen was hidden by the screen saver. I had a hard time trying to figure out how to get out of LwP. Couldn't highlight the "Yes" option after pressing the PS button. Eventually stumbled upon the T trigger and pointer movement. I was p*ss at the UI.
I think the hardware performs as advertised, but like the Cell processor, they need talent to nurture the tech, and polish the experience. In the mean time, I would redo the starting experience. Put in enough help in XMB to set up + troubleshoot easily. The aforementioned camera perspective is very useful IMHO. Should bring one up at least once during the first config. Should exit screen saver automatically.
We all said this before, customize XMB for pointer UI.
Tumble demo gives a very narrow glimpse of the 3D tracking. But may be too slow paced for someone to jump in right away. Same for EyePet. I was boiling in my chair waiting for damn thing to hatch while the professor rattle on.
In that sense, the demoes are godsend because they are condensed experiences. I sure hope they deliver in spades. I haven't tried any of them except Tumble.
I think for your first purchases, buy something you can play right away (no %#}^^%#%^^ long tutorial). Sports Champions seems fine. May need to start at Bronze though. Do Flight Control HD and RUSE start slow ? I have yet to try MAG and Start the Party. Too tired at work.
EDIT: In short, work on the instant gratification !