I was really interested in Wildstar, before it was announced it was going to be sub based and I was really interested in ESO... until it was announced it will be sub based...
I will remain subscribed to WoW because lets face it, neither Wildstar or ESO will be as good as WoW or will warrant spending £8.99 a month to play.
Once they go free to play, and they will do, I might check them out.