Not that it matters, but calling it the Xbox One doesn't matter and will not cause problems with Sony or HTC who both have products ending with "One" - PS One and HTC One, respectively. The wonderful thing about corporate law is that there would only be a problem if the names made it difficult to distinguish the two. Now unless the legal teams of each company have a history of inter-breeding, I'm sure you can tell that an Xbox One is an Xbox, and a PS One is a PlayStation and an HTC One is a product of a company that bares no similarities with the previous two.
Contrary to popular belief, some law does base itself on common sense
Back on topic:
It just makes me want to know what Sony will be releasing, as it's the only console I particularly have an interest in hearing about. The One is impressive, technologically, but I find it irrational to care about something that hasn't been played with yet and hasn't been properly demonstrated. As far as I see product announcements - it looks like a console and is one, but that's about it for impressiveness