OMG... this thread is noob town.
The FULL HD name is only a standard that the media studios and electronics come up. The SD standard was outdated, so all electronic decided to do higher resolution TV, choosing the 16:9 because that was already the movie standard. The choice of being 1080p lines was also because would give the same detail as movies did.
The 1920X1200 was created only for monitor because monitor have the 16:10 standard, created because unlike the TV the monitor needs the TAB/options bar/explorer/ USER INTERFACE etc. So these 120 lines were for the UI not to affect the 16:9 view.
The is no max resolution.... the 1080p is the standard now, simply because there is no need for more now.
There is already lots of monitors, 30''sizes with 2560 x 1600. In fact the 2560 x 1600 is becoming now the new PC ENTHUSIAST RICH GAMERS standard, slowly getting mainstream in the PC core gamers. The 3 SLI 200series gamers out there sure love maxing Crysis at that resolution.