I attended the event, my phone history is that I've had two Nokia E7s, but then had to switch to Blackberrys, initially a Classic and then a KeyOne so I was interested to view the Pro1.
I think there were about twenty people there, all in all, along with the guys from F(x)tec.
There was a brief intro from the team and then we had a hands on with the Pro1. There were I think five (or so) devices for us to get to use.
I can give specifics if anyone has any, but first thoughts:
I only used a limited number of apps, but there didn't seem any lag
Screen was bright, clear and sharp.