They hooked you with their slick technology and now the prices go up.  This is probably a good thing because this will incentivize more theaters to add 3D technology to their theaters.  An estimate from a movie exec told me the average outfitting for a theater is $250,000.

From CNN:

Ticket prices will be going up at movie theaters across the country this weekend as the entertainment industry looks to cash in on growing demand for 3-D movies following the success of “Avatar” and “Alice in Wonderland.”

Starting Friday, prices for adult admission to 3-D movies will increase an average 8.3% at box offices nationwide, according to market research conducted by investment firm BTIG. Ticket prices for IMAX movies are expected to jump 10%, while prices for regular 2-D movies will rise about 4% on average.

http://money.cnn.com/2010/03/25/technology/3D_movie_ticket_price_spike/index.htm?hpt=T2