Ask HN: Where is my dream monitor?

A friend and I were sitting around talking about our dream computer setups, and I got to thinking about monitors.

It seems like we have hit a ceiling at 2560x1600 and no one is even trying to break it. Is there a technical reason (DVI restrictions?) for this? I know modern graphics cards can push way more pixels. The Eyefinity stuff from ATI is one example.

My dream monitor would be 3840x2400 at 125ppi. This would be roughly 31 inches horizontal and 19 inches vertical, and would have real estate of four 1920x1200 monitors.

I know that Toshiba and Viewsonic/IBM had monitors at this resolution for like $18k in 2002, but they were medical-grade 200+ ppi and thus only 22". Surely we can make a lower density LCD at this resolution for much cheaper now.

So anyway, not sure of the point of this plea, other than hoping that someone at Samsung or LG reads this. Oh, and I'd be interested to know what other people consider part of their 'dream setups'.