NFL teams still have a 53-man roster. It is not a de facto 55-man roster despite the new rule that gives teams the ability to promote up to two players from the practice squad for each game. Since the rule is new, it remains to be seen how it will be used and how well each team utilizes the rule. I do not expect teams to routinely promote two practice squad players for every game. There probably will not be any "super practice player(s)" on any NFL team.
The game-day active player list has been increased from 46 to 47 players.