Michael, thanks for your post.
I was thinking about an Apple TV.... but I can do the same via iPhone / iMac as well, more or less.
From my point of view this contradicts the apple mission statement of enthusiasm when using their products.
Furthermore, that doesn't solve the problem with the publicly available tv channels via cable (directed connection with the smart TV).
My Feedback to Apple:
....for my enjoyment of apple products @home it would be excellent if a TV with AirPlay could act as a sender. The idea is to lift up the HomePod from a sounddevice (receiver) for iPad iPhone iMac to an extremely valuable sound system for all AirPlay devices.
Furthermore, if we think ahead, a record player, DAB radio and many other audio senders (devices) can also use the HomePod.
My idea is to take the enthusiasm for the HomePod to a new level.
That would be really great.