It depends, I guess. A lot of people don't see the point. However, I think it will be AMAZING in 3D! For it to hold the highest-grossing film for 12 YEARS, it must've been pretty good when it came out! So who says that won't happen again?
I think it wont be as successful as the first movie, but it will be a good opportunity to be known for knew generations that didnt have the chance to watch it on cinemas (it's not the same thing to watch it on tv that in cinemas, its 100% better) and for the fans to enjoy it even more.