I'll admit, I'm of mixed minds. I'm not really a purist, but I'd lay odds I know as much about JRRT's life as the filmmakers. Most fandom members, particularly those who have more than dabbled in Silmfic probably would, and that's not a criticism of the filmmakers. It's just that we're all geeks. I'm also really concerned they'll try to turn his WWI days into a parallel of balrogs and dark towers rising out of the earth, and just... no. For all the obvious reasons that would bother me quite a bit.
On the other hand, I really feel a kindred spirit in JRRT. I don't always agree with his views -- I disagree quite a lot, actually -- but there's something about his unique mix of scholar and (sub)creator. I guess I just feel at home with his soul, if that makes sense. And as many movies as I see, it seems a real shame to miss out.