And while the traditional BlackBerry OS was never designed from the get go for touchscreen input (RIM adapted it to be touchscreen friendly), BlackBerry 10 has absolutely been designed as a touchscreen OS. (crackberry.com)
When touchscreen gameplay became a new phenomena we had no shortage of titles like Infinity Blade and Fruit Ninja pioneering ways to merge touchscreen input with the precise thrill of an action game. (eurogamer.net)
Windows 8 began down the road to mobile friendly functionality, it was certainly built with touchscreen input in mind, but it somehow felt like an incomplete operating system to many, with a UI that made sense for a tablet experience, but lacked in old school Windows functionality on the desktop. (androidauthority.com)