If you are looking for a wearable monitor but don't want to look like a myopic cyborg (those of you who already do, please accept my deepest sympathies) then you could do worse than Teleglass's limited edition T4-N video glasses. Its titanium frames were designed by spectacle designer Kazuo Kawasaki and the rig, which is iPod-compatible, weighs just 30 grams. More info below.
You can connect the T4-N to any NTSC-capable video and watch on the two 640 x 480 resolution monitors that can be adjusted to avoid eye strain, that sit behind the lenses. That's like watching a 45-inch screen from two meters away. Audio comes through the frame-mounted earphones.