WTF are you supposed to do about an Operating System? 64bit can only address 128gb of ram (I think).
The theoretical limit of the 64-bit environment iis somewhere around 17 EB (17,000 TB I believe) but you're right, I don't know of an OS that will address more than 128GB of RAM at this point.
i cant see why anyone would need 192GB of DDR3 and 5 1.5TB HDDs xD
I can.

Multimedia work: the more hard drives and the more RAM, the smoother everything runs What you can't cram into your RAM gets streamed off your hard drives. The more hard drives you can stream from at the same time, the smoother everything runs. There's really no limit - the more, the better.

If I loaded all my music software into RAM at one time, I could easily fill 128GB of RAM. Two times over. I'm serious.

Who the heck needs four monitors anyway?
Same example: multimedia production. If you're making a 1080p video, you'll want at least twice that much screen realestate (for the video and for the toolbars, etc.). One for your internet activity/manuals and whatnot could be useful as well, and one for the audio mix. If you're making music, you'll want a monitor for your plugins, one for the notes (the more screen space for your music notes, the easier. Trust me on this) , one for the mixer, one for the video you're synching the music to..the list goes on. 4 monitors definitely have a purpose for people buying top-end systems.
