Panasonic announced a prototype of a 103 inch plasma display panel (PDP) with 1080p(progressive) HDTV resolution at the CES 2006.

The Panasonic Plasma tops the Samsung 102 inch Plasma by 1 inch - congratulations - Now when can we buy it?

Update:
Panasonic Says 103" Plasma TV in Stores this Christmas in the US

Panasonic says there are numerous technical challenges in making plasma panels that are larger than 100 inches measured diagonally while maintaining stable discharge and high picture quality across the entire surface of the panel. Panasonic has overcome these technical hurdles by developing a new rib (A “rib” divides each gas cell and prevents interference between adjacent cells to produce clear images) and phosphor for these super large panels.

The panel incorporates Panasonic’s 1080p HD high-speed pixel drive. The same high-speed pixel drive is used in the TH-65PX500 65-inch 1080p Plasma TV. The contrast ratio is 3000:1.
If you want to see if this baby will fit in your living room, the measurements of the viewing area are Width: 2,269.4 mm Height: 1,276.6 mm Diagonal: 2,603.8 mm.

More details in this Panasonic press-release.