Wild guess. Perhaps they will be available on a per day or per encounter basis.
2) Give an automatic success to a skill check. You really need to convince the major of the city that there is an underground network of drow about to attack the city. You fail your Persuasion roll but quickly spend an action point.
3) Give an automatic saving throw (or automatic reroll). You have just failed that save against the opponent's flesh to stone effect and if you are out of combat the group fails. You spend your action point to shrug off the effects.
Mmmmm.... Another action. He didn't by any chance specify what kind of action or if that was available to everybody did he?
Mike Mearls is on the project so it is possible they will be like tokens from Iron Heroes.
Also, the factotum is a fairly recent class that had access to something similar- inspiration points. This is the reason I was thinking of a per day mechanic.
"Say me what you're showing off for, and I'll say you what you lack!" (Spanish saying)
Book 13 Anaclet 23 Confucius said: "The Superior Man is in harmony but does not follow the crowd. The inferior man follows the crowd, but is not in harmony"
"In a country well governed, poverty is something to be ashamed of. In a country badly governed, wealth is something to be ashamed of." - Confucius