What are the biggest uncertainties in the development of communications?

One of the main uncertainties having to do with digital television is that the development of HDTV recording media is slower than the development of HDTV broadcasting technologies. This will mean that only prime-time entertainment programs will be available in HDTV at first. For more regular broadcasts, like the news and sports, every news journalist will need to have a portable camera that supports HDTV. If HD recording technology stays behind, the supply of HDTV programs will be limited.