You get a 23" FullHD LCDTV with selected LG Full HD TVs. It's not currently clear what the full range is, so I guess we have to wait and see as it's not currently shown on the official site.
I think after this deal, all of the major TV manufacturers will have released their promotions for Christmas. The only ones missing are Toshiba and Hisense, but I doubt they'd have an offer.
For easy comparision of all offers, just go to the main JBHifi site.