Xbox one - 7 letters
Xbone - 5 letters.....![]()
I had no clue you meant the Xbox One, so either I was being stupid, or the abbreviation is not that obvious. Probably the former ;-)
"Xbone" is actually a derogatory term, created by individuals to mock both the name (as it's actually the 3rd Xbox, so calling it "One" makes no sense to techies thinking of versions) and the device itself (by people who disagree with Microsoft's approach to including media center features in a game console). I guess they imagine it as a toy that their Xdog would fetch and bury.
"X1" is shorter and carries much less connotation. Just don't confuse it with Comcast's DVR.
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780M is already used in laptops...no reason NOT to be included in the next imac upgrade
Given the relative performance differential, the reason not to include it is that it doesn't really help. I'm sure Apple is urging Nvidia to do better and provide some kind of 780MX/790M, so that they don't need to post a chart in the performance section of the 2013 iMac brochure that screams "2% faster graphics!"