Jamie at CineTechGeek points out several of the changes coming with (and things to watch out for with) the imminent transition from the InterOp DCPs (Digital Cinema Package) to the fully compliant SMPTE DCP.

It is important to note that although he says that he has made sure that his clients are ready for the change in April 2011, not everyone needs to, or should, make the transition right away, when the transition begins. The full transition is expected to take a year and there are many reasons that changing is not optimum right away.

That doesn’t take away from the many good points that are made in this video: 
CineTechGeek » SMPTE DCP’s are coming