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Although similar in outward appearance to the recently launched Tablet PCs, smart displays are little more than wireless monitors and have low processing power.
NEC's SD10 has a 25cm LCD, is based on a National Semiconductor Geode processor and has 32Mbytes of memory. The Windows CE operating system, on which the device is based, takes up around 10Mbytes of this memory, leaving the rest available for local caching of information.
NEC will put its smart display on sale in Japan early next month for ¥99,800 (£522).
NEC's device has been on show before as a prototype, both under the NEC name and also that of Tatung, the Taiwanese company making the device for NEC.
A prototype device from Fujitsu was also on display. Detailed specifications were not available and the company did not release firm launch or pricing details, but Microsoft said this device would be available shortly after the NEC machine goes on sale.
Launch details for overseas markets have yet to be announced by NEC and Fujitsu.