TP2 phones will be upgradable to the new WM 6.5.
For our international users, this means: There will be a ROM update posted on the htc.com/support website.
For US users it means: We have to wait for our carriers to push out a carrier specific ROM upgrade.
They too can be found on the HTC website, under Support, but you'll have to make sure you drop-down to the proper carrier (Sprint, Tmobile etc).
All of our phones can get this upgrade.
As far as TF3D: it will have new features as well, all courtesy of the new ROM upgrade. It looks like they're going with TF3D 2.1, but one just never knows for sure.
Here's the Microsoft Announcement:
http://windowsteamblog.com/blogs/windowsphone/archive/2009/09/01/windows-phones-are-coming-on-october-6th.aspxHere are some pictures of the possible TF3D:
http://www.boygeniusreport.com/2009/08/23/more-windows-mobile-65-love-htc-mega-screenshots-revealed/