Yeah for something like a tv or monitor, you have to see it in person or you're rolling the dice. How's the glare? How does it look from other angles beside straight on? Hows this 4K res compare to the one next to it?
Even if Amazon could provide a Hololens sessions for me to look at the product (which maybe they should do at some future Amazon retail location) alongside all the specs and reviews, it's still not going to bridge the gap of seeing it in person.