After the success of Cameron's Avatar, it was certain that the business would react. While some films released this and next year had already been planned as 3D features all along, others were filmed in 2D and simply got an additional layer for the theatrical release, like Clash of the Titans. The result of the latter films is hardly worth the extra money, regardless of the film's quality.
So here's a list of some of the real 3D releases for the next months and the ones that try to cheat.

Real 3D, because filmed as such:

Cars 2
Toy Story 3
Resident Evil: Afterlife
Legend of the guardians (An owl...fantasy adventure)
Megamind (Supervillain with Will Ferrells voice has to safe the earth)
The Adventures of Tintin: The Secret of the Unicorn
Tron Legacy


Fake 3D, because filmed in 2D:

The Last Airbender
The Chronicles of Narnia: The Voyage of the Dawn Treader
Cats & Dogs: The Revenge of Kitty Galore
Harry Potter and the deathly hallows
Priest (Paul Bettany as vampire hunter)

I am particularly disappointed that Harry Potter will only get a transfer. Everyone will go see this film, the regular option will probably not be available much and people will pay what they have to.
What worries me is that this method will soon backfire and people will get tired of 3D thanks to the wanna-be releases. Especially with films as "Jackass 3D" and "Step up 3D". The business has to make sure it has plenty of spectacular films to offer to even it out.