Honestly, I think it was an indirect statement. Perhaps he meant Hip Hop as a whole. He's saying that he disappeared for a while but feared not, because he had pass the torch to anyone that was willing to take it and keep Hip Hop in a respectable state.
Fast forward, all we have to show for it is Drake as being considered "The Best" rapper out. So yeah, I think Eminem was mad at Hip Hop in general. The game has become so water downed and for the most part, uninteresting, that when Eminem peeks his head back up we're REALLY grateful. And that's a shame. MC's with CLASSIC albums should be everywhere. We had no problem doing it in the 90's. It can still be done, but it's up to every MC to decide for themselves.
1) Risk my artistic integrity and make what's popular just so I can get paid and remain relevant?
OR
2) Make music with substance, fuck those who can't appreciate it, and thank those who do appreciate and still support financially, thus keeping me relevant and paid without risking my artistic integrity?
It's a huge decision for an MC in determining if he wants to sell out. Selling out can sometimes go horribly wrong. Abandon the old ship, the new ship sinks, and the old shipmates from before aren't willing to take you back. But yeah, I'm getting off point a bit. Interesting conversation nonetheless.