Reuters and New York Magazine reported the obvious yesterday that the remaining two Harry Potter movies will be in 3-D after Warner Bros. exec’s saw Avatar.

“This change is expected to add $5 to each film’s production cost and $500 million to their box office revenue,” writes NY Magazine.

In the aftermath of the gargantuan success of Avatar, movie-makers are rushing to follow suit and I’m betting you’ll be seeing plenty of movies being released in 3-D. Clash of the Titans (below), starring Sam Worthington of Avatar fame, will most likely be the next big movie to be given the 3-D treatment.

This 3-D business seems to be the future of movies, but I remain a little hesitant about the whole deal. These movies aren’t being made initially with the intent of being released in 3-D, but their production companies want moviegoers to shell out the extra $5 a ticket — in addition to the already outrageous $11 — for the 3-D experience to boost ticket sales.

Personally, I think the only reason Avatar was able to dethrone Titanic was because of the extra cash they got from 3-D screenings.

In most cases, movies are given the 3-D treatment after completion of the film. I don’t think it’s fair for moviegoers to pay the extra $5 and only get Harry Potter’s want sticking out at you. But if movies are made with the intent of being in 3-D, like James Cameron’s Avatar which was shot in 3-D from the start, instead of being converted to 3-D afterwards, it truly adds to the movie-going experience with filmmakers making a conscience effort while shooting and setting up their shots/scenes and paying attention to the little details that will make their movie worth me forking over the additional $5.

So, here’s looking at you, Clash of the Titans; a lot is riding on you to see if you can pull off being in 3-D after the fact.