It's a question that has been asked for centuries but there's never a clear answer. So if there is no clear answer then why do people keep asking that question? I suppose so one can pontificate on what "true art" is.
I've seen homes where there's bears and outhouses on the walls; I've seen homes with nudes throughout; and I've seen homes with modern abstracts or a combination of everything. I've even seen homes with the landscape that's right outside their windows hung on the walls.
And you know what? That's fine. To each his own in his own home. That's cool.
I suppose the big discussion comes when it's public art. What is acceptable art? That's a different story. Art use to follow a wide set of cultural guidelines, until the art scene was tantalizingly consumed by an obsession of "anything goes". Pushing the limit is seen as the pinnacle of art. So now we have art made from smears of chimpanzee poop, pee in a bucket and beheaded doll babies. That is not art to me!
You can call me old-fashioned or playing it safe. I don't care. I'm a traditionalist. I like realism, fantasy, and beauty painted onto a canvas. But, even though I live in the country you won't find sweeping landscapes or local vistas in my home either. If I want that.. I'll just go outside.
What do I have on my walls? Well...... you will just have to visit some day. Or I might make a virtual tour. But I'm sure you won't find a decapitated doll baby or a junk sculpture here.
Enjoy your day! Enjoy your week! Enjoy your own kind of art!