There are two things that need to be addressed:
The newer antennas from Shakespeare and Glomax are designed to pick up both analog and digital signals. I have also witnessed old Shakespeare antennas pick up digital signals just fine too. The bigger issue is the TV. Most newer flat screen TVs have a built-in digital tuner (ATSC) but not all. Old TV’s won’t have it. A digital tuner is required to watch the new digital channels. If it’s not built into the TV you’ll need to buy a converter box for each TV. With the right antenna and an ATSC compatible HD TV, you’ll also pick up over the air HD channels, which have been out for a few years now without much knowledge. In Vancouver harbour you’ll pick up 4 or 5 HD channels for free as clear as your HD cable at home. You will most likely have to do a channel scan in the TV menu to pick up the digital channels and redo the scan when you move to different locations that have different channels.