I don't have an answer for US release date, but I wanted to mention that I, too, do not like the "intangible" downloaded idea. But, because I already played the hardcopy of Ego Draconis, I am now downloading the FULL Saga version-- and I'm paying full price for it (I rarely pay full price for anything!), because I am buying it direct from Larian.
Not sure as to the validity of what I've read here in the forums, but one person posted (who has other posts that have been extremely reliable) that after downloading the digital copy, you can burn it onto a disc as a "hard copy" form of backup. I am hoping this will work, because that it my plan. I don't want to wait until the game is released on DVD in the U.S.-- I'm patient, but not that patient! The game was awesome to play, and based on the professional reviews I've seen posted, this revamped version is supposed to be even better! Can't wait to play. Now if my ISP server would just go faster.....
I'll try to remember to post whether the 'burn to disc' works-- I usually have problems when it comes to saving to disc.
Anyway, all best to you all!
~~CierraShore