Of course a lot depends on the quality of the image and none of us have seen that and how hard/durable the glass screen turns out to be, and only time will tell on that...
I like the recessed screen on the PW1/2 as the OP points out it protects the screen. I'd bet that with the official cover closed on our PW1 and PW2 for the majority of time there is nothing at all touching the screen.
Hope the Voyage cases have a nice soft none scratch inner surface to protect the glass screen on the Voyage...
On the subject of upgrading - had the price been the same as the PW2 (£109 in the UK) I'd have pre-ordered. At £169
AND a new cover

I'm waiting for the reviews. It will have to be REAL special to part me from that much.