Basically, all of this is paving the way where a national ID card...probably run by the Social Security Administration....will have to be created to prevent illegal votes creeping into the system.
About a decade ago, my folks (in a southern state) needed to go and get re-registered to vote. The county clerk refused to accept the driver’s license as the one-and-only ID (as the old practice)...you had to bring in a birth certificate, with two forms of ID (one could be the phone or utility bill).
If your state's drivers license in in conformance, you can use that license to get on airplanes and go into a federal courthouse. If you state drivers license does not conform to Real ID, then you have to use a passport.