Tomlinson Holman, the TH in THX, left THX to co-found Audessey.
For those not in the know, the Audessey calibration system and hardware many home cinema receivers come with addresses the problems the great majority of users have: Room correction and EQ. It did to home cinema what THX did to the movie studio mixing room and movie theater.
Of course, just using Audessey is not going to be a magic bullet. You still need to have a room with good control over ringing, etc. You still have to know where to put your speakers. And you still need your speakers to be at least in the same family. But if you put in the effort, start with semi-competent hardware and maybe tweak a little what Audessey comes up with, you will have sound better than most has-been multiplexes.
In short, Tomlinson Holman has done more for movie sound in the cinema and in the home than people realize.