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I can completely understand why you'd want to ensure that your equipment will be compatible with the ignite TV system before deciding to make the switch.
As long as your TV is compatible with HDMI it should work without issues. If it is an older TV and there are issues with HDMI, there are adaptors that can be used to resolve these issues.
I hope this will help you in your decision to switch to Ignite TV. Let us know if you'd like help making the switch.
FYI, I had the same problem with my older 2006 Sony Bravia TV that would not setup with the new Ignite TV control units.. A Rogers Tech came in today and checked it out. He changed/ reduced the digital video output resolution setting as recommended in other post responses, But it Didn't work.
At the end he used an HDMI to YPbPr+R/L converter and plugged the older video cables into the TV and it worked .. More cables and all, but at least I can use the old Sony..
The problem is not picture quality, it's that the Ignite remote won't control any function of the tv during the setup.
You tell the tv that it's Ignite which it can see but it will not see the model # of the Ignite box
I just installed a 2020 Sony Bravia yesterday and I've tried everything !!
Thx and good luck