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As Microsoft announces a new tablet, technology experts offer their first impressions of the device, as well as insights into what the product could mean for Microsoft and its rivals. The BBC has compiled a round-up of what some of them are saying.

For decades, the tablet computer was like a mirage in the technology industry: a great idea, seemingly reachable on the horizon, that disappointed as hopeful companies got closer. Microsoft has experienced this cycle of hope and disappointment many times....

In its biggest-ever push into the hardware business, Microsoft unveiled a tablet computer called Surface that is designed to challenge Apple’s iPad. At an event here, the company showed off the device, which is about the same weight and thickness as an iPad, with a 10.6-inch screen. The tablet has a built-in “kickstand” that will allow users to prop it up for watching movies, and a detachable cover that will serve double duty as a keyboard.

Microsoft is expected to make a "major" announcement Monday. Speculation about the Los Angeles media event is that the company plans to unveil either a tablet computer or a system that uses an upcoming version of Windows to help people access TV shows and movies across a range of devices.

Smarter smartphones? New devices gain ability to learn by touching. There’s a form of extra-sensory perception called psychometry, whose practitioners claim to learn things about objects by touching them. Smartphones set to be released this month by Samsung and Sony will have some of that ability: they’ll learn things when you touch them to pre-programmed “tags.”

The device, running a new version of the Windows operating system, would be the first computer of the company’s own design — and would be aimed squarely at Apple’s iPad.

Moody's ratings agency on Friday downgraded Nokia's debt grade to junk status, citing greater than anticipated pressure on the struggling cellphone maker's earnings after it announced plans for major cuts and global layoffs. It kept the outlook negative, meaning it could downgrade it again.

Nokia says it will slash 10,000 jobs and close plants as the ailing company fights fierce competition, and gave a grim outlook for most of the year, causing its shares to plummet 18 percent to close at €1.83 ($2.30). The Finnish cellphone maker also on Thursday announced personnel changes and said it has agreed to sell its luxury phone brand, Vertu.

Co-founded in 2009 by Twitter cofounder Jack Dorsey, Square enables people to accept credit card payments on iPhone, iPad or Android devices... In a move that positions the company for a potential initial public offering, Square has hired former Goldman Sachs and Salesforce.com executive Sarah Friar as chief financial officer.

Multiscreen gaming is emerging as a major trend as consumers increasingly access games through their PCs, consoles, tablets and smartphones.