i.e. people with money that want to resell something later for more money, just like any investor (or collector). That doesn’t say ANYTHING about the quality and/or value of the artwork. If one canvas work sells for 1 million and another sells for 2 million, is the two million one 1 million dollars more artistic? Nope, it’s just seen as a stronger investment. And, come next year, if that particular artist is no longer trendy, the buyer may NEVER make that 2 million dollars back... especially if no one in that insular group of folks that are invited to auctions of that caliber want to pay that much for it. Again, nothing in that speaks to the artistic value of the piece, OR how long it took to reproduce just to the investment (or collector) potential.
Which again, is just about people with money wanting to buy things just to say they own it (collector) OR to hopefully resell it for more (back to the same group of folks) in the future (investor).
I suspect even applying the criteria set as you describe digital art has a long long way to reach that status. Big problem of digital art is that it requires to be powered unless it’s ON state can me permanently display similar to an OLED without degradation. I am aware oil on canvass also degrades over time without proper preservation containment.