The "first" main stream hi-res display? I have some Sony Trinitron CRTs in my basement that would like to talk to you.
I refused to let go of it for so long exactly because there was no LCD that would be an upgrade, with the sole exception of the expensive T221. Guess now's the time :-)
It was pretty nice a decade ago, when everyone was moving to LCD monitors that were vastly inferior in every measure beyond size or weight, but, at least in terms of ppi (and on consumer grade equipment), display technology eclipsed the CRT quite a while ago.
edit: I'd forgotten that CRTs were measured with the bezel included, so at 20" viewable, the display is 128ppi. So closer, but still pretty far behind.