Not sure what to think, we are moving towards a fully digital future, we are probably anything from 5-10 years away from that future, I personally haven't burn a disc in over 5 years, have been using pendrives for ages, have about 5 or so from 2-16gb also have a 16gb MicroSD on my Smartphone that + Wifi Sync + DLNA completely removes the need of discs for me My main rig doesn't even have a Optical Driver.
That being said I still see the need for Optical Discs, because not everyone is a geek like me =P or sometimes doesn't have the same resources I have there's allot of differente situation where WIFI or Pendrives aren't indicated.
Then you have the Music/Game/Movie Industry still relaying on Disc Sales to reach most of their customers, and that is why we still better/bigger Optical Discs, Music and Games is transitioning very fast, but the Movie industry isn't because of their Piracy paranoia (but lets not discuss that), so the Movie industry will be the last to achieve full digital sales, and I'm guessing 15 years or more, has the only way I would see them going this route would be streaming and allot of people don't have proper internet for that.
Finaly you have people that prefer their Media in Discs since it gives them a bigger sence of possession, I personally don't care as long has I have access to my media, but it matters allot for allot of people.
So yeah we will probably even see a next generation after this one, but unlike before were you had the industry and the users both using Optical Discs to store media, now only the industry will still rely on that, since us users are moving from burning discs to pendrives and what not.
PS: Lets not forget 4k the Movie industry will need bigger Discs to store 4k movies.