Hey I don't know the answer to your problem, but I thought I'd pipe in and let you know a while back I saw a Toshiba laptop at Circuit City with the Personal Theatre display... and man I was almost considering purchasing the $1500 laptop instead of the $300 LCD... it is truly a work of art...
Haven't seen the dell UltraSharp or Toshy equivelant so, as I said, I'm not much help, but if you do decide to go with the Personal Theatre they are awesome!
BTW Good luck with your laptop purchase (future)... Lemon[H]ead purchased an iBook this week that should be coming soon and I am about to wet myself with excitement.
Cody