F1 wont be big in the U.S. until they;

- Televise races when people are actually awake
- do a better job of marketing the drivers and giving the general public a chance to learn who they are actually rooting for. (NASCAR has done a great job of this).
- Get announcers who are more Americanized. Let's be honest, most Americans do not relate to the European commontators and they are not that great/exciting to listen to. They need to do a better job of with the broadcasts.
-They must race over here

If those four things don't happen, F1 will never really grow into anything substantial in the U.S., IMO.