It was clearly stupid from Alston to slap Eddie House. Still, I think he won’t get suspended and I must say he doesn’t really deserve a suspension because technically, following the NBA rules, a slap isn’t an elbow, and also because it was a frustration move but certainly not intended to hurt House. So the league should view this play as it is (a stupid move from a frustrated player but nothing dangerous), give Alston a fine and move on.
I think that's what the NBA is going to do, especially when there is a lot of more dangerous plays going on in the Lakers Rockets series.