Given that Apple holds about three different events a year, WWDC in the middle of the year, an iPhone event in September, and an iPad event in October, there is a good chance that the device could be announced at any of these events, unless of course Apple creates a separate event entirely or changes their schedule.
According to the report, the alleged TV will feature a frameless design and will see its display panels sourced from the likes of LG, with Samsung for graphical processing, and with Corning supplying Gorilla Glass 3 for the glass cover that should make it a little harder to break/scratch. Ultimately these Apple television devices are predicted to cost between $1,500-$2,500 per unit.
Take it with a grain of salt for now, but we have been hearing about this alleged device for a while now with no concrete evidence, so hopefully 2014 will the year that we will actually see something.