Apple TV Delayed: Why?

If Apple did not release an official statement, several consumers waiting for their Apple TV in USA received a message from the Apple Store indicating that the shipment will be made in March, with first the first delivery of Apple TV to users initiated on March 20th.
We are not really surprised by this delay, as the Apple TV is almost a Mac mini so once more Apple was too optimistic regarding its capacity to deliver on time. On the other hand, the date of March 20th sounds a bit strange: a rumor was indicating a potential "Special Event" on March 20th, described as the date chosen to introduce the revision of the MacPro and Apple Cinema displays (probably all going HDCP ready). So Apple might have decided to push the Apple TV introduction to a later date in order to demo its HD video abilities on a new 42" Cinema display HD.