I have been asked to offer my opinion (and that's all it will be an "opinion")
You would have thought if my opinion was warranted I would have seen a BETA many weeks/months ago! but it appears it will go down the exact path TW2 did, because of the pressure to release it.
1: TW3 needs to be BETA tested and improved as the bug reports come in (by qualified approved users) not the general population. This requires time and a lot of it to be able to offer the best quality product before release.
2: I think people expect too much from the technology.
3: There should be NO upgrade fee for people who have TW2 as it was a disappointment to so many and hasn't been fixed (and never going to be by the looks of it).
4: The TW3 DEMO plays fine on my computer AMD64 3500+ 4GB of RAM and a Nvidia Geforce FX 5500 Graphics Card. though I did notice some "flicker" in full screen mode. I would suggest computer power/resources play there part in what you see. "Tours" meaning multiple panoramas suck up heaps of resources and people add way too much content to a single tour.
5: You MUST be able to choose you OWN images and compress them how YOU like with what software you like!
6: You should be able to call from (2 sets) of panorama images. One Low Res and the Hi Res fullscreen version as needed. NOT all downloaded and cached to memory.
Anyway, that's how I see it. I don't like all the doomsday comments and threats of this and that - but you all have the right too them. As for there being better out there WHERE is my question? 3DVista is a joke and has always been one, if you think it's better or even good your not walking the same planet as me.
In the end most of these tour makers don't live up to people's expectations. Based on what I have seen even if the upgrade is free - people will still complain because it won't handle 10 scenes with pop-up images a skin and poxy background music and pan silky smooth under any conditions with any computer.
Thats the whole problem I think. People's computers are not up to it. Maybe yours is? But what about the customer/client etc? You don't have control over this.
Easypano have produced the DEMO tour and yes the images aren't 100% and the stitching could be better but this doesn't really matter! They obviously believe the quality is good (at least on there computers) otherwise why announce it to the public? Like I said, it plays fine on my system.
Forget fullscreen for tours that's just too much for basic computers to handle. Select a viewer size and optimize the panorama images to fit. Perhaps you could try different computers to see where you notice differences?