Today's Tech: Samsung Galaxy S4 tops 10 million sales and HP announces its new all-in-one PCs and laptops

London's Tech City has unveiled its answer to The X-Factor: the Million Pound Startup competition. Aimed at discovering the best aspiring tech ventures, the competition launched at Digital Shoreditch 2013 this week. Registration is now open and interested parties should check out the Million Pound Startup website for more details - applications will close on 29 August, 2013. There are no real barriers to entry for the Million Pound Startup: participants must represent a young company (no more than 10 years old) with a modest turnover (less than £1 million), and a willingness to relocate to the Silicon Roundabout area. The competition is being backed by a range of leading figures and organisations, including the Mayor of London, City University London, and the Tech City Investment Organisation.

HP today announced its newest consumer notebooks and all-in-one PCs, placing an emphasis on affordability, power and portability. The models feature new processors from AMD and Intel, and touch-enabled screens. The laptops will debut between now and the summer, with prices ranging from £329 to £429, while the all-in-one PCs range from £699 to £899, appearing this summer. Forming the line-up are the HP Pavilion 11 TouchSmart, Pavilion 14 TouchSmart Sleekbook, Envy Rose 20 (HP's first ever portable all-in-one) and Pavilion 23 TouchSmart. Follow the link for pricing and availability.

The United States has accused Iran of orchestrating a number of cyber-attacks against US energy companies, which officials have described as worrying. Iranian hackers were able to infiltrate the computers behind oil and gas pipelines, in addition to electricity grids, gaining access to control systems and conducting surveillance missions. "This is representative of stepped-up cyber activity by the Iranian regime. The more they do this, the more our concerns grow," a US official reportedly said. "What they have done so far has certainly been noticed, and they should be cautious." US authorities have suggested that these attacks could eventually lead to attempts to destroy key facilities, citing technical evidence that linked the hacks to Iran. They also indicated that retaliation might be in order.

Finally, Samsung has confirmed that the Galaxy S4 is its fastest-selling smartphone. Since its launch on 26 April, the South Korean electronics giant has shifted over 10 million units of its flagship device; a feat that has surpassed the sales performance of the S3. "On behalf of Samsung, I would like to thank the millions of customers around the world who have chosen the Samsung Galaxy S4," said J K Shin, CEO of IT and mobile communications at Samsung. "At Samsung we'll continue to pursue innovation inspired by and for people." The S3 is Samsung's former best-seller, having taken 50 days to reach the 10 million mark. Samsung has now flogged well over 40 million Galaxy S3s. Around a week ago, it was reported that six million Galaxy S4s had been sold and it was predicted that sales figures would break 10,000 by the end of this month.