They are just recommendations. Like how they came out with the limiting mammograms recommendation last year. There are tons of organizations out there - there have always been some that recommend against PSA screening, some that recommend it, and some that take no opinion. This is a comparatively large organization but it is by no means the only voice. There have always been lots of organizations that don't recommend it (I think one has been the family practice association).
For a lot of people (especially patients) it depends on your perspective and your priorities.
I don't think this is going to change much. There are already tons of men who don't go for screening. This provides more support to their decision but obviously isn't going to change it. And there remains a large number who will want it, regardless. And of course, remember that this recommendation is only for asymptomatic patients. I am not sure what % of biopsies are done on people without any symptoms whatsoever, but it's probably less than you think already.
There is also the complicating factor of active surveillance as an option after diagnosis. This still requires biopsy but treatment (and most of the complications) is deferred.
So are there men who have a doctor's appointment this month who will not get PSA screening who would have last month before the recommendations? Possibly, but it probably isn't a huge number.