For over the air reception... Though some companies slapped an "HD TV" label on their antennas, all they did was jack up the price, IN days of old Analog television was broadcast on channels 2-60something (originally 1-13 then 2-13 then 2-83 then 2-69 and now 2-60something. The frequencies for these channels has not changed since.. Well the dawn of television.. Only the number of channels.
When they switched to "Digital" They did not change the frequencies of the channels. THOUGH now the "Display" channel. may or more often than not, MAY NOT be the same as the broadcast channel. Examaple of both, Where I am now Channel 7, is the same old channel 7 it has always been only now it's 7-1,2,3.
Where I summer they use... I think.> Channel 41, but ti still says 7-1,2,3 on the screen.
THe moral. The same antenna still works.
HOWEVER. Many stations (like 7 in my summer) have moed to UHF, adding the WINGMAN (about 30 bucks) to a Winegard Sensar II or III will improve UHF range and performance.
Swapping a SENSOR PRO for the wall plate with the switch and light. EVEN more improvement.
But depending on where you park, may not be needed.
Now Satellite..
Roof top antennas suffere from a major shortcoming.. If you are parked under ye old Evil Signal Eating Tree. NO SIGNAL
Ground mount with 50 or 100 feet of RG-6 gets "Around" (Literally) this problem
HOEVER an IN-MOTION Roof mount (DISH ONLY) can record while you travel.. If you have a DVR, but alas only one channel. alas they don;t work well with DirecTV