Those hoping for a close-up look at Nintendo's new console were left wanting.
President Iwata Satoru showed off a prototype of the Revolution, which will be significantly smaller than its rivals.
Nintendo aims to make it the size of several stacked DVD cases and the colour has yet to be decided.
The Revolution will play DVDs, have built-in wi-fi, an SD memory card slot, and 512Mb of flash memory.
But Mr Iwata was coy about providing detailed information about the technology powering the console.
Instead he said Nintendo was working with computer giant IBM and graphics firm ATI to ensure graphics that would make gamers "say wow".