Microsoft's Surface tablet with Windows Pro, set to be released in January, will have half the battery life of Surface with Windows RT. The software giant has revealed US pricing details for the Pro tablet, which will run on the full version of Windows 8 instead of the scaled down RT version that the current Surface model runs on. The new device will be available from January in two options: 64GB for $899 (£560) or 128GB for $999 (£623). A tweet posted by...