In fact, Comcast is predicting that it will be able to offer one hundred and twenty HDTV channels Computer Wire in the near future and four hundred normal digital channels. That is, they transmit all of their available channels to every subscriber all at once and then allow the individual TV receivers to filter out programming based on which programming package the viewer has subscribed to and the individual channel that's displayed on the TV screen. One of these new developments is switched digital video.If this Switched Digital Video Technology sounds a lot like video on demand, that's probably because it is very similar. This is especially convenient because these digital receivers will be able to work with the Switched Digital Video technology that's forthcoming as well.Another thing that's pushing TV technology forward is the coming transition from the older analog TV Coaxial Cable Manufacturers signal to digital TV for all over the air TV transmissions. Since only one channel is sent to a subscriber at a time, there would be plenty of room for hundreds of channels. Once the central server complies, the receiver then puts the contents of that channel on the TV set.