They won't be the first nor the last Indy developer to sit up and say, "You know what? X-Com was *AWESOME*, lets bring it to the current century." There's a lot of "spiritual successors" out there [http://en.wikipedia.org/wiki/X-COM#Spiritual_successors], the end product usually either fails to capture the appeal of the original game or never gets released. But I'm wishing them luck nonetheless.
I think the trouble is that the original X-Com did everything perfect, so perfect that X-Com 2: Terror From The Deep and X-Com 3: Apocalypse both failed to capture the original appeal. If you flat out copy X-Com to the level needed to capture that appeal, somebody's liable to cry, "foul" for obvious plagiarism. However, if you deviate, there goes the whole appeal you were hoping to capture in the first place.