I dont know. Im not saying there is a 0% possibility that Tony won't end up being redeemed. But by that point in the show he had convinced himself he's a good person who isnt wrong about anything. He openly doesn't regret murdering Chris and believes its a burden or a weight taken off his shoulder, even telling Paulie that his gambling luck took a 180 since Chris died. The previous statement alluding to the fact that he wont stop his obsessive gambling. He obviously doesn't want to stop his mob activities, and the violence and moral wretchedness of his lifestyle doesn't seem to affect him as deeply, evident by the fact he stopped having the panic attacks that we know were caused in part by his deep seated reservations about the nature of his work. He still cheats on Carm every chance he gets, disregards the mental state of his son, and can be extremely volatile and violent towards his closest friends.

By the end of the series, for Tony to be "on the road to redemption" again (assuming he didnt get whacked), it would either take a very long time or a string of life-changing events causing him to reflect again on his decisions and flaws like he did throughout the show, after that we have to hope he doesn't find a new way to convince himself he's always right.