Toshiba showed a split-screen demo of 4K resolution on a relatively small LCD set. The purpose was apparently to show how their new Cell processing can upconvert 2K sources to 4K. You can't see anything in the photo, but on-scene the 4K was a bit sharper-though the 2K side looked softer than I would expect from good 2K material.
Toshiba also showed the 2D to 3D feature that will be available on the company's new cell-equipped LCD-LED sets. It does work, and much better than I expected, and was watchable if you must have 3D 24/7, but (no surprise) it was no substitute for the real thing.