It doesn't immediately have that effect. Very likely police will continue to use stingrays until courts explicitly rule against it (and probably has been appeal

It doesn't immediately have that effect. Very likely police will continue to use stingrays until courts explicitly rule against it (and probably has been appealed to the supreme court). However this does indicate the way that the supreme court leans. Not only does this suggest they would rule against stingrays, but it also might push lower courts to also rule against them.