If you own some kind of tablet, you can make it do double-duty as a wireless, external add-on screen for your computer, if you don't mind laggy, pixelated graphics and are happy with just ten inches of extra space. It's handy for maxing out a laptop in emergencies, but hardly ideal.
Toshiba's USB Mobile LCD monitor, though, looks a whole lot better. First, it has a nice big 14 inch display. Second, it sends both power and pictures over a USB cable. Third, it costs just $200, clearly showing the downward pressure tablets like the iPad have put onto screen-only products (remember when a digital photo-frame would cost hundreds of dollars?).
The LCD screen has a 1366 x 768 resolution for HD movie watching, and weighs in at 2.8 pounds including the supplied case (which also acts as a neat stand).
This is a specialist product, to be sure, but it's both portable and cheap enough to be worth a look. Would you want to lug an extra couple of pounds around a trade show like CES? Probably not, but if you're editing photos or some kind of mobile spreadsheet jockey, $200 is a bargain.
Mobile Mobile product page [Toshiba]
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