I watched this short segment on the Today Morning Show (US), looks like they're back! While searching for the segment it looks like they ran one similar a year ago. http://www.today.com/video/hit-rewind-cassettes-are-making-a-comeback-992574531690
You'd think companies would start making more cassette players so people can actually listen to them. I've only seen 2 new portable cassette players available in UK shops recently.
If you look at the segments, there's one nearly identical from last year. They really pushed this story hard, I don't watch much mainstream TV but it was on and I had to wait until the last few minutes to see the clip.