Normally, West Ham United should win comfortably today. It would be a surprise if Luton Town get even 1 point from this match. Luton Town looks like the worst team in the league by far. I don't think they can stay in Premier League at the end of the season. West Ham United did a very good start to the league though. Michail Antonio and Jarrod Bowen are in great shape.
You are quite right about them winning comfortably but I still feel they can draw the game. They haven't won any of their 3 games and West Ham may look to make this game their fourth unlucky fixture.
That tactic David Moyes usually uses of introducing Antonio Michael in the second half always has a positive effect on the side as he most times produces goals more than when he starts. Another interesting player to watch is James Ward Prowse. Ever since he came in for them, he has played a key role for the club, having a goal and an assist to his name since joining from Southampton.
We may see West Ham win with at least three goals. If that happens this would be the worst record in Premier League as Luton Town being the first team to lose their first three games of the season with 3 goals differences.
They may secure the three points or even draw. But if they manage to win, I doubt it will be by three goals since they have scored three goals in two of their three games. I just feel West Ham may score and lock their defenses.