Ok... I'm not sure what the difference is between Plasma and Flatscreen... sorry that just the girl side of me... BUT I can say this much....
Newly refurbished Deluxe rooms do in fact have a thinner, wider, flat screen TV housed within a decorative armoire: Polynesian, Wilderness Lodge, Contemporary, and Animal Kingdom Lodge Villas currently feature this.
The newly refurbished rooms in the All Star Music resort, including the Suites, have a "standard depth" tv with a Flat Screen front...
Grand Floridan is currently in the process of slowly refurbishing their rooms, but no word yet as if any buildings/foors have been completed. The main refurb is supposed to take effect later in the summer from my readings.
I really like the look of the new deluxe rooms, for the first time I was actually interested in staying at the Contemporary resort! Several of the other Deluxes are also due for a bedding upgrading that will be happening through out the year as well. It's nice to see Disney taking care of their resorts... it makes spending $300+ on a room a little bit more worth it!