Oh no, terrible news. A guy who reinvented himself how many times? And was apparently in the process of doing it again (only heard one cut from the new album).
Check out this footage of him in 1996. He could have been milking the Let's Dance thing for mega-millions, but he decided to change it up completely - his look, the sound, the way he moved around the stage. This band is absolutely killing it (some won't love the song but whatever). I've heard that he played none of those massive hits during this tour. RIP, David.