This means that there is more hope for teams like Manchester City, Chelsea, Newcastle and Aston Villa to get a place in the Champions League. These teams will probably try very hard in the next games to win each game because if they finish in 5th position they will go to the European Champions League. If Chelsea had managed to maintain the good form they had 2 months ago, if my memory serves me right, then they would be in 3rd position at the moment.
This was the reason why most of this club fans were actually looking to see if Arsenal can avoid defeat, my thought was actually maybe the slot will be added until Arsenal progresses but this is actually a great opportunity for the clubs you listed above, i think this will only create more competition again between this clubs. For me Newcastle need to try and stay clear of this Chaos by actually playing winning the extra game against Crystal Palace, this places them at fourth place three points behind Chelsea in the fifth.
Mathematically I think I will be drawing in Nottingham Forest into this battle too, they just four points above Chelsea and Newcastle, should Newcastle wins the game at hand they would be only a single point behind them, I think this 5th position been added simply means that even Fulham at eight position with just five points behind Chelsea can still believe and Brighton behind them can still hope for European competitions.
With Manchester United and Tottenham still in the Europa league there is a chance of having six premier league clubs in the champions league next season and possible 9 in all European competitions next season too.