Why are we switching to DTV?

An important benefit of switching to all-digital broadcasting is to free
parts of valuable broadcast space for public safety communications such
as police, fire departments, and rescue squads. Some of the available space
will also be auctioned to companies that will be able to provide consumers
with more advanced wireless services like wireless Internet services.

A digital transmission is a benefit to the consumer because of the enhanced picture quality and enhanced sounds. Digital TV is also more efficient than analog.