Windows 8 came out in 2012, and was in development years before that.

Windows 8 is a major release of the Windows NT operating system developed by Microsoft. It was released to manufacturing on August 1, 2012, made available for download via MSDN and TechNet on August 15, 2012, and generally released for retail on October 26, 2012

Laptops is a subset of PCs. Only 10% of laptops were touch, not 10% of computers.

80% of users are dumb. A touchscreen laptop is an expesnive way to get your screen dirty.