@figuerres: I'm sporting a pair of Samsung 305T's that are 30", 2560 x 1600 resolution. They set me back about $1300 a pop though, and I'm not sure if this particular model is still being manufactured. I have seen equivalent Dell displays, however. I also saw an Apple display with the same resolution, but as you'd expect it costs about 3 times as much as every other one for the privilege.
do the math, you are still at about 80-90 ppi with that large screen .... it's not even close to 200 ppi.
take that 2560x1600 but put it on like a 15 inch display! then you are getting close.