I used that same Sony monitor extensively while at ATI. It was a BEAST. The thing is, even with higher resolution CRTs, their properties often went above current specs of the time, so graphics drivers had to do funky things with the timings to achieve those resolutions. For instance, reduced vertical blank timing which worked to get higher resolution on some models.

The way things are going now, I wouldn't be surprised to see something matching IBM'2 T221 sooner rather than later. 9 Megapixels! 3840x2400. We could run it with two DVI connections but still at a reduced refresh rate, each connection actually driving half the screen. 15Hz with a single connection.

The first I heard about Apple going high res was 2 to 3 years ago when they supposedly worked up a display consisting of 4 1920x1080 panels joined together. Nothing's ever come out of that though.