They will keep going up IMO
If the TV money increase doesn't match the increase on transfer fee's, then clubs will start charging even more for tickets
At that point I see two scenarios
1 - Going to the football becomes a past time enjoyed only by the rich and or by day trippers who do it as part of a holiday. These people will be less invested in the teams, so despite reasonably full stadia the atmosphere will get increasingly worse until it takes some of the shine of the game, but the TV companies will keep paying and Football will essentially become like big Boxing matches, with obscene ticket prices for the best seats and most people just watching it at home because they can't afford to go. I reckon at that point they'll be showing 3-4 live games a day on the Saturday
2 - People just stop going to the match because they can't afford to go anymore. The rich decide they can't be bothered going either. Matches go on in front of increasingly emptier stadia every week, until the TV companies turn around and decide they won't be renewing at such a high price anymore, because ratings are dropping. At this point, clubs realise that they can no longer charge the big ticket prices and offset the lack of custom with the TV money. Most will have to lower ticket prices to get people back in the stadiums again, but they'll be unable to spend as much as they could on players. Player fees will likely remain what they are for top names but will drop considerably for the mid level players. Most clubs will have midling players on high wages that they won't be able to get rid off and these players will hang onto these big wages as long as they can before leaving on bossman deals. The transfer market as we know it will essentially crash, with some clubs likely to go under completely or only just scrape by due to the huge drain caused by the inflated wages not being plugged by the lower TV deal and ticket prices. Crowds will gradually start slowly growing again but the damage will be done and a lot of clubs will need decades to recover from the crash