Yes, indeed now they are 6 points ahead of Manchester City, but Manchester City has 1 game yet to be played, and if they can win that match, they will reduce the gap to 3 points. And if we look at the rest of the clubs they will face, Manchester City have fairly easy opponents from Arsenal, while Arsenal still have some tough matches.
That possibility still exists, that's right. If Man City can win next, then the difference in points will be even smaller. So there is still a chance for Man City to take over Arsenal's position. Later there will be a match that will certainly be very influential when Man City against Arsenal. It will be like a betting round for their position. And Man City will probably insist on winning, unless for some reason especially the UCL.
This is the toughest stage for Arsenal to determine if they can win the league for the season. Arsenal will be playing against tough teams in their remaining games and it is not very certain if they will win all this up coming games. The winner of the Premier league is just too unprecedented, with the points difference between arsenal and Manchester City it seems Manchester City can easily found their self to the first position because winning is something that is not too had for Manchester City.