For most people, watching FOX6 will not change. If you have cable or satellite TV, this transition to DTV in February 2009 will not affect you, because your cable or satellite provider will continue to send the signal to you as you get it now.
The dramatic difference will happen for people who watch FOX6 with an "off-air" antenna or listen to FOX6 on 87.7 FM. After February 17, 2009, you will no longer be able to see FOX6 on your traditional "channel 6" and you will not be able to hear FOX6 on 87.7 FM.
Instead, you will need to use a digital tuner to see FOX6 on digital channel 50. Your digital display will still say "FOX6," but your tuner will physically need to be tuned to digital channel 50. As for the radio, there will no longer be a radio frequency that will broadcast the FOX6 TV signal 24 hours a day.