Considering how little Festool BRD seems to care about the American market I wouldn't hold off on buying a needed tool to wait for them. As others have mentioned, the T15 can handle pretty much most jobs. The only time I pull out the corded drill is for masonry, multiple hole saw holes or hole saw holes 3" or over. The T15 doesn't seem to mind 2.5" hole saws. 3" and it starts to cry a bit.
If Festool brought over a hammer drill, I'd stand in line for it. As a rule I avoid standing in line for anything.
Need to go back to my dealer tomorrow and take back that piece of crap light though. I had to fiddle with it right out of the package, then it worked only briefly. Put a new battery in it, still doesn't work. $20 shot. Have to see if it is under the 30 day policy. Anyone else have issues with theirs?