First, LGA-1366 is once again set as a platform for another new Intel architecture (westmere)
Second, do LGA-1366 owners have to worry about the future upgrade etc? Am sure that your processors are not yet tested to reveal their full potential. So, chill. An upgrade requirement for you will be atleast 2yrs away and by then, even if LGA 1366 processors are available in the market, you will be so bored of seeing the same mobo everyday and moreover, more and more upgrades would've happened (sata 6G, PCI3, USB3 and lot more).
So, for core i7 owners, it doesn't make any sense to worry about future upgrades