In reading this article at Toms hardware, it sure sounds like keyboard and mouse will be allowed on the XB1. That sure ratchets up it's usefulness if this is absolutely true.
from article:
"If you host clients at your home, use the power of IE and the size of your TV to showcase your new redesigned website, or snap IE to the side while using SkyDrive to present sketches you're working on," he describes. "Because Internet Explorer has access to the Office Web Apps, pair that with a Wi-Fi keyboard and mouse and you have the means to edit documents, when necessary, even if you aren't near your PC."
http://www.tomshardware.com/news/Xbox-One-Marques-Lyons-Business-Skype-SkyDrive,23508.html
Is that cool or what??