I hate Topalov's position. His bishop on c1 is rubbish. If he castles Kramnik will use the open h-file, if he stays in the centre Kramnik will use the open e-file. I think Kramnik may play Kf8 rather than castling to keep the lovely open h-file whilst trying to get his king into a safer place. I think Topalov may try to move his king to g2 without castling.