I'm not sure if I would call it a rebirth of the series, but it was certainly a rebirth of my attention and love of Pokemon. It was kind of getting stale to me, honestly. During the 4th Gen, I would literally get bored and put the game down for a while. HG/SS was more interesting, because Johto is my favorite region, but even that got boring for me during the Kanto part of it.
With Black and White, however, I was really excited for it. I pre-ordered the Japanese version of the game, and I have never done that before. As soon as I got it, I couldn't put it down. It's still fun for me, even now that I've had it for a month.