Roughly 10% of Americans are millionaires, for reference (though I doubt all of that is liquid).
It's hard to find precise qualifications for how they determine that, though. The households figure doesn't include primary residence value (why?), and the individual statistics don't mention liquidity. I suspect that only a small percent of that 8% actually has $1+ million liquid.
So yeah, 4%-ers then. Really makes a big difference to my point. This is totally gonna change everybody's life. (I.e. those who can afford it, while the majority is scraping by from paycheck to paycheck.)