Realizing it took avatar until March to pass $700 million. This movie did it in just over two weeks, which is astounding. Avatar was at about $390 million on the day TFA crossed $700 million - meaning Avatar made $250 million from this point on. Jurassic Park was about $500 million at this point.
Star Wars has zero competition until maybe Zoolander 2 and even then probably not. Expect somewhere between $900 million and $1 billion domestic - which is completely insane and probably something that won't be broken for at least 10 years. (It's unlikely Rouge One will have the pull.)
Not sure if it will catch Avatar's worldwide gross - which is $2.7 billion - but it hasn't opened in China yet. However, Star Wars isn't the cultural phenomenon in the rest of the world that it is in the US. (For instance - avatar did $162 million in Germany, but TFA has only done $80 million - though after 3 weeks in Germany Avatar had only done $53 million.)
Normally I don't get so into box office, but I find these world-shattering records fascinating....Both Avatar and Titantic were such long slow builds - TFA was not remotely that, but it still should hold well - I just don't know about holding into March like those movies did.