DominicCobb said:

Also, what's the point of doing a movie if it's going to be exactly the same as the stage show?

to preserve the show for future generations. To make it more accessible. If it put into movie form, it means one can buy it when it is released on blu-ray and watch it whenever one wants. One does not need to try to find a stage production someone and buy what could be an expensive ticket.

DominicCobb said:

Also, stage acting and film acting are very different.

Sorry, I have never been able to buy this, at least when we are talking about bringing a stage production to the big screen. You can not possibly tell me that Colm Wilkinson would not do well staring as Jean Valjean in movie version of the musical. He was great in the role on the stage and he'd be singing the same songs, saying the same lines, doing the same things, as he did on stage. Why could he not do on the screen what he did on the stage?

There are many examples of the same actor reprising a role on the big screen that he did on the stage and doing with success. Rex Harrison in My Fair Lady. Yul Brynner in the King and I. William Daniels in 1776. There are many examples of a Broadway stage actor/actress moving to movies with big success. Julie Andrews anyone?

I seen it work before, just almost the entire cast of the movie version of 1776 were from the Broadway show. It worked there, I would bet all my money that Colm Wilkinson would work in the movie version of Les Miserables.