There were two concurring opinions in that case: One was signed by Justices Alito, Ginsburg, Breyer, and Kagan. The other--the one whose quotes you cite--was Justice Sotomayor's alone.
There can't be a "concurring opinion" signed by five Justices. An opinion signed by five Justices is a majority, and would constitute the Opinion of the Court.
I think that the most we can say right now is that although the "plain view" doctrine has been weakened somewhat over the last couple decades, it's not completely dead yet.
The fact is that there hasn't been a case on point to answer the questions as to whether 1/ALPRs constitute a "search" under the Fourth Amendment (a threshold question that must be answered "yes" to proceed further), 2/whether use of the technology can be "reasonable" under any circumstances, and 3/whether there are any exceptions to the warrant requirement. We have a long way to go before we know what the law is on this technology. Remember, too, that the Fourth Amendment has only a "reasonableness" and a warrant requirement. It does not ban technologies for surveillance outright. (See, e.g., Kyllo v. U.S., where the use of thermal surveillance technology wasn't the issue in and of itself, but rather constituted a search necessitating a warrant.)
So how about you tone down the attitude a bit? You're arguing from shaky ground, and there are more constructive ways to contribute to this debate.