Peter Bright certainly does know what Windows RT is; the guy is known for in-depth technical reviews of all things Microsoft and Windows. The last page of this particular review includes the following:
"the ARM version of Windows, Windows RT, will bundle Word, Excel, PowerPoint, and OneNote, all of which are desktop applications"
http://arstechnica.com/information-technology/2012/07/does-w...
The review was done with the x86 version of Windows 8. I assume a separate Windows RT review will be available once the Surface ships in October.