I've wondered why PTP 2.0 is only in beta, more than a year after it was announced.
Now I think I understand, we are waiting for krpano 1.17
Now it's become urgent to move out of flash to html5. And ofcourse we want it all from PTP1.8 and more. And you can't move to 2.0 without multiresolution and html5.
Then we have to wait for krpano 1.17 ! Here's why : http://www.krpano.com/html5multires/
I've played with the preview of the 1.17 viewer and it works fine on my Samsung S3 :-)
When this is done the debacle of panotours, iPads, Flash, Apple may be put to rest.