i am looking forward to zero-blacks. ever since giving up the crt, black levels have been the number one concern i've had(because it's been the number one complaint i've had) when shopping. i honestly believe there's only been about 10-15 displays made that were 'black enough' to be considered. so even though oled has it's own problems, its just refreshing to have a different problem to worry about.
that being said, i'm really, really happy with how front projection is going, and the last time i upgraded my display(to the samsung f8500), i had to basically throw out my projector and buy a better one because i couldn't stand the elevated black levels. right now the f8500 and x35 have similar MLL(the x35 actually slightly better). if i upgrade to oled, and it becomes my new standard, i don't think i can afford the projector that achieves comparable MLL, haha.
Displays: Samsung PN64F8500/JVC X35
AVR: Pioneer VSX-1130K, 7.1/5.1.2 audio
Sources: HTPC, PS3, XBOX360, Wii
Control: Harmony One