Nope. Those are more complex devices suited to a wide variety of tasks that the user generally has to be seated for.
(Your stance would make the HomePod redundant, too, since iMac or MacBook can be used to play music & podcasts.)
A general-purpose screen that hooks into the home Wi-Fi network and offers Siri interaction to the whole family - without passwords, user accounts etc. - would find lots of use, I’m sure.
Similar stand alone communication/information consumption devices formerly known as "internet appliances" have been thrown on the technology dung heap for the past twenty years.
They seem "ok", but only for a very narrow niche market such as grandma and grandpa. However, they fail quickly because the mass market never buys them. Why because it's such a narrow use case. Here's one example, the original "iPhone", before the Apple iPhone that we know of today ...
http://www.internethistorypodcast.com/2015/06/the-forgotten-story-of-the-iphone-released-in-1998/