I think Grosjean is a future world champion, too. He's been superb this year, because for every success that Raikkonen has had, Grosjean has shadowed him, despite being far less experienced. Perez is also one to watch. Maldonado has some serious pace about him too, he just needs to tone his aggression down with his overtakes. He has been quite reckless this year and earned himself numerous penalties that he really should have avoided. Lotus are certainly developing a fantastic car though, it will be a great finish to the season IMO.
As for the 2014 regulations, 1.6 litre four cylinder engines is going to be a real step down for Formula 1.