I have not completely misunderstood you.
Yes the new remotes have an IR sender. Definitely this would allow them to control a TV.
They also have BT.
The BT is definitely used to control some of the features.
Whether the new remotes use IR to control some of them I couldn't say.
In the demonstration we were shown, the remote wasn't being pointed at the Sky Q Silver box.
I'll leave you to work out what that means.
Now the Sky Q Mini has a different remote to the Sky Q and Sky Q Silver. It is possible that more of the remote's controls are sent via IR, but I wouldn't could on it.
My point is, which you may have missed, is that whilst the remotes supplied with the Sky Q TV box range all have BT, you can use a Sky+ HD remote if you prefer. It is also possible to use a One-for-All remote if it is suitably programmed.
However what I can't say at this time, because I've not had an opportunity to play with one and get through all the potential permutations of questions that are being asked, is whether or not all the features can be access via IR.
Actually, scrub that, when Voice control is launched later this year, IR will be defunct. Well in so much that IR will most definitely not allow you to everything.
Below are a couple of images. Note that the remote for the Sky Q & Sky Q Silver that there is no fast forward or rewind buttons. This is because it works in a similar way to the Sky+ app.
With the remote for the Sky Q Mini there are buttons. Both remotes will work all the boxes.
Sky Q & Sky Q Silver remote:
Sky Q Mini with remote: