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The world's most popular games console is being upgraded. Japanese games giant Nintendo is developing a high-definition model of its Wii console, which has sold more than 30 million units globally.

Though no official announcement has yet been made despite numerous rumors, games developers in Japan have been given top secret briefings on the next-generation console, thought to be named Wii HD.

The new console will support high-definition graphics, bringing it in line with Sony's PS3 and Microsoft's Xbox 360 and will likely debut in late 2011.

The Wii HD is also rumored to feature a high-capacity hard drive for the storage and streaming of digital content such as music and video. Meanwhile, Nintendo has unveiled its new hand-held games machine, the DSi.

A successor to the company's hit Nintendo DS portable games unit (pictured left), the new DSi has two cameras and can play digital music.

It is 12 per cent slimmer than the current model DS and has a slightly bigger screen at 3.25 inches. An SD slot has also been added for storage of photos and, potentially, games. The DSi will be released in Japan on November 1 and cost about $225, but it will not be in shops here until late next year.

The current model DS is the best-selling portable games console on the market, with more than 50 million units sold globally (one million in Australia). More PlayStation 3 News...