My consern regarding discount had nothing to do with Tower 2011. In fact personally owning Tower 2011 I see no reason that I should get a discount at all in the first place when purchasing Tower 3D, they are completely different products regardless of when you purchased it in my opinion! :)
As for upgrading from Tower 3D to Tower 3D Pro thats a completely different story. I cant talk for all of us here but I bet many are much less interested in Tower 3D than Tower 3D Pro and will purchase Tower 3D just because the Pro version is not available yet. I hate to have one licence for Tower 3D and one for Tower 3D Pro beeing the same core sim and all I really care about was the speech recognition part.
In my humble opinion both versions should have had speech recognition to begin with, then the standard version would have been all I needed.
Mike