Lenovo's ThinkPad X1 Fold is the world's first foldable PC. Its 13.3-inch OLED screen folds down the middle, allowing you to use it in laptop mode with a mini-keyboard, fully open as a handheld tablet, or as a standalone screen, propped up by its kickstand. This fascinating innovation doesn't come cheap, though. The starting price is £2,301.43 (inc. VAT; £1,917.86 ex. VAT) in the UK, or $2,499 in the US.
Lenovo ThinkPad X1 Fold review at ZDNet