At least one major PC maker is expected to show an Intel "Bay Trail" tablet running 64-bit Windows 8.1 at Mobile World Congress, according to a source familiar with upcoming plans for those tablets.
Hewlett-Packard, Dell, Lenovo, and Samsung are some of the most prominent PC makers to offer Windows 8.1
tablets running on Intel's Bay Trail chip. To date, Windows tablets
based on Intel's newest -- and redesigned -- quad-core Atom processor have run in 32-bit mode.