Kobayashi was no Montoya, but still a loss to the sport given his popularity. I don't think he has a future in F1 though, he didn't make a big enough impact on the teams, only the fans I believe. It does seem harsh that he was only 6 points behind his teammate (would only have been 2 points if he had been more patient trying to pass Schumi in Brazil), and his teammate goes to McLaren and he doesn't get a drive.
The trouble is, in F1 at the moment, you have proven drivers in the top 5 teams, Ferrari, McLaren, Red Bull, Mercedes, Lotus, and the rest of the grid is filled with unseasoned rookies. So noone really knows how good half the grid is.
The only rookie/young-gun who we have any idea how good he is, is Grosjean. The rest have proved diddly squat, because they have been racing against teammates who have proved diddly squat in cars we have no idea how good they are.
This. It seems like teams only care if you get podiums, like checo did