Surely any stand alone sound centre will be able to bring up a menu on screen - in the same way that AV receivers do.i.e as an overlay.
From my playing with the Eclipse, the B&O menus appear to be an overlay. There is no commonality with the LG webOS. That is similar to other brands too though - the smart platform looks one way, the settings menus look another.
The bigger question re any future sound centre (to me) is whether it offers source routing (lots of HDMI pass though ports), or whether it just gets its audio via ARC from the TV.
I believe the B&O menus on the Eclipse allow picture settings / speaker groups to be set per source - because it does the video pass through.
So i dont think a detached sound centre, if similarly equipped to the current, will be any less than the Eclipse when it comes to control.
The only difference i expect is that it won't come PUC equipped, and will rely on HDMI CEC, possibly with voice supplementing. That combo can be quite effective, much as i hate voice myself. And i know, i'm in the minority who believes that PUC will disappear from future video products - at least i wouldn't count on it. Its not what i want to happen, its just the way they will go i think, with a non-trivial probability.
Both the new Sonos Beam, and the Alexa Cube use voice+CEC, and others will follow. Be interesting to see where the Phillips / B&W venture goes with respect to interconnectivity.
I suspect that come 2019, and any B&O sound centre, IR blasters will increasingly be seen as a thing of the past.
.