This was an excellent and very well written article. As mentioned the law is going to be so difficult to enforce but the problem with the law is that is actually working as a scare tactic.
The article also says:
Do you know what I say – Let them run! Let all of the lousy, sneaky, cheating online gambling companies run away from the US market and never come back (I pity the Europeans which would be unfortunate to play at their properties).
This is where I tend to disagree, there are many reputable companies that had no choice but to leave the US, especially if they were publicly listed companies.