I'm really split. According to the rule of three, we should stop at three generations, but Nintendo will surely keep sapping Pok?mon's popularity so that they can maximize their profits.
As for myself, I went through the same emotions when G/S came out as when Ru/Sa came out. I was quite anxious at first saying, "This'll never work!", but after the games came out, I was like, "Nintendo really found a way to make it work...those geniuses!". I'm doing the same thing again now. Just wait unti; D/P comes out...