After seeing that there was a post of the Playstation 4, I went ahead and made a post of the Xbox 720.
(Disclaimer: This doesn't mean I prefer the 720 any more than the 4...just thought some people might be interested, plus wondering "What about the 720" after they read the article/post about the PS4.
That being said, let's begin.
It seems that in a sheet from Microsoft, it reveals that there is going to be an "Xbox event" sometime soon this year, which might possibly be the event in which the 720 is announced.
Even though the sheet makes people wonder, and make assumptions of the event, Microsoft hasn't provided any replies to the topic or any sort of reaction to it.
It seems they're doing quite a good job keeping their information about the 720 secret, after all.
You check it out yourself, and ask yourself if the Xbox 720 might be announced in this event. The current rumors are that it might be announced in April, but no one is 100% sure.