And, unlike blackjack, I assume it's entirely legit to count cards (at least, the cards you can see). Still, if I was a gambler, I'd be nervous of online play. In addition to the fact that you could be playing against computer-augmented human players, like you described, you could also be playing against an entire table of virtual opponents controlled by one actual person, who would have a significant edge in terms of visibility of hidden cards and whatnot. Also, what assurance do you have that the house isn't cheating behind your back and biasing card draws or feeding information about your own hand to opponents? What assurance do you have that the house hasn't been hacked by one of your opponents?

At least, with a physical game, these sorts of attacks are much harder to pull off, even if you've got conspirators with a private signalling strategy (ala the MIT blackjack team).