The average major motion pictures makes its way from the big screen to your DVD player in about four and half months.
And you can expect the size of the interim to shrink in coming years. There are three key drivers. First, studios make more money off of DVDs. Second, the marketing budget for the movie release is still fresh in the minds of consumers when the DVD hits the shelves. Why let the buzz disappear? It makes no sense. And third, home theaters are becoming so advanced that you often have a better screen and sound quality at home (if only my wife would let me install cup holders in our couch).