I don't think kpop will ever get into the virtual idol concept simply because of stan behavior not being as possible with that.
Well there’s KDA that do extremely well, but I doubt the company/artists have them as priority which makes things even more impressive
1) a lot of people are company fans, they will support whatever their favourite company sells.
2) the KDA is a good example, vtubers and vocaloids are also good examples
3) parasocial relationships as one of the biggest selling points in kpop, they can be applied to virtual characters as well (see point no. 2, also game fandoms and anime fandoms)
4) the investment in virtual idols while high on entrance level (design, system building, application design etc), in the long run is much cheaper in terms of maintenance costs and risk managment. Virtual idols will not ask for a raise, or a break, get into relationships or get involved in scandals of any kind, since they are 100% controllable and adjustable. They cannot get sick, they cannot get injured. They will not leave the project. They have no limitations on traveling and visas and corresponding expenses and they can be at multiple places at the same time. And they can offer a truly 24/7 outlet to fans, especially as we move towards personalized usage via applications, virtual assistants, virtual friends or companions, home holographic setups etc
5) I am not talking about taking over the industry but they will certainly take a percentage of the available pie, thus increasing competition.