the intermission was introduced in the era when indian films on an average were close to 3.00 - 3.30 hrs long.
i honestly dont see this trend changing even though our movies are only 2.00 - 2.30 hrs long these days.
its a good thing to have a break in-between....go to the loo etc without missing the action.....give your eyes a break.....chat up with your friends about the first half etc...