As someone who doesn't have a device yet, and won't till they're available commercially, I think your asking the 'geeks' first is entirely sensible, since you're doing it in in a public place where I can read and learn. (Forgive me, clever technical peoples for calling you 'geeks' but...)

An awful lot of what is said here goes clean over my teddy bear head. But I can actually work out when people are struggling with something. If 300 experts look at an app for download and find it problematic, it's pretty fair bet that I shall when the time arrives. If they all say it works smoothly, they I have hope that it will for me too.

Certainly what the tech-genii want may not be exactly what I want from a device. I shall have my turn as commenting eventually. And contrary to other's experience I've been made entirely welcome here despite my complete ignorance and tendency to ask for explanations in short words. I said there was an app I really, really want - and a bunch of developers polled for interest and are now working on it. (Hopefully it will eventually make it to the app store too!) I don't think you can ask for better than that.

So far the responses will be from the people with preview devices. Over time, opinions will be more varied. But if you want the full range of opinions, I don't think I'd ask in a specialist internet forum.