In recent time it has been Liverpool and Manchester city competing for the league title, they have relegated Manchester united and Chelsea that used to be the main competitors. I don't mention Arsenal Because they haven't shown any seriousness in their title race. Arsenal doesn't have any good squad to win the title, wining title depend on the maturity and winning mind set of the players. That is why you see Arsenal struggling every year for the title.
Liverpool is the strongest team in the league this season losing only one game out of 27 matches, only strong team can do such. Liverpool is taking advantage of the fact that Manchester city poor form this season, no team to heat the top with them, Nottingham tried but they are immature to push for the title, then the funny Arsenal has not chance. They always lose important game, Arsenal can't give liverpool heat for title, the strong this season Liverpoor will lift the title with ease.
Liverpool and Manchester City are controlling Premier League for years due to their superior quality and consistency while Arsenal is also doing good but sadly due to poor strategy of Mikel Arteta with bad rotation policy hurting them, and they fail to bring themselves to the top of Premier League.
Now it's long time Chelsea and Manchester United are also suffering which is giving them not chance of having good results at the top level in this season Manchester City is also suffering due to injuries and also poor performance from their top players which give them no chance of fighting for title race which is now all set for Liverpool. Next season is going to be competitive as many teams are now having good players into their squads and things could be more improved in coming months which will help them for having good chance of staying at the top spots.