[dangrossman]

Was there any factory capable of producing 15" panels with 220+ LEDs per inch ten years ago?

[wmf]

IBM (now Sony) http://en.wikipedia.org/wiki/IBM_T220/T221_LCD_monitors

(BTW, LCD != LED.)

[robin_reala]

The T220s were very nice monitors, but they just tipped over the 200dpi mark, not the 220+ one.

[FireBeyond]

So basically 15 ppi, then - your comment reads as someone trying to exaggerate the difference - the T220 was 205 ppi, and some of Apple's Retina devices are 221 ppi, a grand difference of merely 7% - well, seven per cent and eleven years.