My first thought was something along the lines of "this creates many new possibilities for GOG". I'll be very interested to see what's next for them and us.
Frankly, though, the only game I'm really excited about right now is WC:P (which currently does not include the add-on) and the hope of getting the rest of the WC franchise on GOG later this year. The other games announced do not really interest me. Well, I might try some of them out.
We'll just have to wait a few months before we see how this whole thing will continue (I'm really hoping for Blade Runner, myself), and if/when the identity of the other two potential publishers can be revealed.