Windows RT is a version of Windows 8. It's designed specifically for tablets and other devices that use Nvidia's ARM processors. HP hasn't ruled out an ARM-based slate running Windows RT, but says its initial Windows-tablet efforts will focus on business customers.

Microsoft recently surprised the tech world--and perhaps its longtime PC manufacturing partners as well--by announcing two new tablets it plans to sell under its own brand. The upcoming ARM-based Surface for Windows RT is a consumer device, while the pricier and more powerful Surface for Windows 8 Professional features an Intel Core i5 (x86) CPU and is target at business users.

The tablet announcement is a dramatic change from Microsoft's traditional OS business model, where it licenses Windows to hardware makers such as HP, Dell, and Acer, who in turn build and sell PCs running the Microsoft OS.

An HP spokesperson today sent the following statement via email to PCWorld:

"HP continues to look at using ARM processors in business and consumer products. However, our first Win 8 tablet will be on the x86 platform focused on the business market. The decision to go with x86 was influenced by input from our customers. The robust and established ecosystem of x86 applications provides the best customer experience at this time and in the immediate future."