Having watched both the theater and movie versions of Les Misérables, I believe the film version has taken advantage of the scope and scale of cinema. This is just too grand a film musical event to overlook.
The film version is very loyal to the theatrical version, with little additions to keep the pace fit for film viewing. There are also lots of close-ups that seem director Tom Hooper set to differentiate this version from Broadway or West End productions: as in the theater rely on full body movements, this film relies on pained expressions from the cast.
Speaking of the actors, the cast is sublime. Hugh Jackman, Anne Hathaway, Russell Crowe (whose singing seemed to lag with the rest of the cast), Amanda Seyfried, Sasha Baron Cohen, and Helena Bonham Carter all had performances worthy of praise.
Les Misérables is a film event everyone should make an effort to watch-- this could be 2012's best film.