I think it's a shame, it's pretty obvious that the rules will be set up to favour the 4-strokes (it's what the manufacturers want, after all), so that's it for 500 racing. Also, the superbike guys are only a second or so off the GP lap times at most circuits anyway - if they aren't constrained by having to make the thing at least look like a road bike, I can't see the 500s being competitive once the 4-strokes are reliable.
It's good that there's more development coming, the rules in 500s are too restrictive to make it all that interesting, but I will miss them. Totally loopy bikes.
Next season will very likely be about whose bike works, rather than who is the best rider. I expect Rossi to run away with it if the new Honda is sorted and reliable, but you never know.