Arsenal to me are title winner already, Manchester city still has tough opponents to play, which they might drop point in these games. But Arsenal has no much opponents compare to Manchester city. if Arsenal maintain this performance and keep playing every games as final they will succeed, i don't see any team stopping team this season to clinch the title.
Let's wait arsenal to win a few more matches. I think that it's too early to declare if arsenal has been winning the trophy. The gap was big enough but city has not yet given up. This must be noted if city has not yet lose, anything can happen at the end of season.
Arsenal will have difficult matches at the end of the season and it can change the result of EPL. There are still around 11 matches remaining for manchester city.
I think that if arsenal may able to lose EPL to the city at the end of season. None knows what surprise that may happen at the end of season. Did you remember the season when leicester city was competing with totenham?
pep guardiola will not give up until manchester city had zero chance to win EPL.