I fail to see how artistic expression would cease to be a thing and how people will stop liking novelty. And as long as those are a thing, original styles will also be a thing.

If anything, making the entry barriers lower would result in more original styles, as art is [at least] frequently an evolutionary process, where existing ideas meet novel ones and mix in interesting ways. And even for the entirely novel (from-scratch, if that's a thing) ideas will still keep appearing - if someone thinks of something, they're still free to express themselves, as it was always the case. I cannot think of why people would stop painting with brushes, fingers or anything else.

Art exists because of human nature. Nothing changes in this regard.