Installers will use a sat finder. If you do it yourself most TVs have at least one composite connection. Another option is to use a PC monitor if it has a composite or HDMI port, or even use a DVI to HDMI adapter.
Nothing stays the same, you cannot hold on to legacy stuff forever and expect it to be compatible until you pass away.
Oh i wasn't referring to it being difficult to install or the co-axial for tuning. I install Bell, and i'm glad the 4100 has a co-axial output, because lots of customers have older tv's with only one composite input. This might make things a bit tricker, or require the use of an RF modulator.