Been there, done that...
I want one, but they're not available in the UK...
A bit disappointing.
This is news? http://www.hollywoodreporter.com/news/life-pi-director-ang-lee-422270
A more important factor than the pupil size is actually seeing the eyes and getting a nice glint in there - which sometimes means a light pointed right at them!
This only applies to flash stills photography! And it's an easy fix in photoshop.
So... you liight someone in dim light to open up their pupils, then 'flash' it looks good, but they're going to be reacting to that bright flash for a few seconds and you may have to wait till they relax again. Not optimal.
"minimum focusing distance of 17.7in (0.45cm)" Something wrong there.
Zoomed right in it looks bit soft to me here, but that could be this web page.
Then again for $649 you get what you pay for.
Opens up a few nice possibilities.