Here's DIYer Tak who took an IKEA product and made it more useful. He turned it into a completely hideable workspace with a desktop computer inside!

IKEA's Vika Veine is a very cool desk on its own: it basically opens up to reveal your workspace. It comes with a felt lined inside that can be used as a bulletin board and comes with pockets for your things. Here's how Tak did it:

I bought a Viewsonic LED monitor because they're super-thin, and have both a VESA mount, and an DVI jack that's parallel to the screen.

The most difficult part of this project was to drill the VESA holes through the top of the desk accurately. I countersunk them, then attached the monitor to the inside of the desk. I filled the holes on the top with some wood filler to keep it flat, then used some silicone caulk to attach the desk-pad permanently.

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Vika Veine Convertible Computer Desk | IKEA Hackers