This is the first time in nearly a decade that I hope a game is available on optical media, but my gaming PC doesn't even have one. Between Battle.net and Steam, I never had the need for one.
You're remind those guys who said, "PC gamers don't need DVD's" when PS2 games shipped on them. I said, "You'll want them because eventually even PC games are going to use the storage space."
The same goes for Blu-ray. When PC gamers said "We don't need Blu-ray, we have Steam." I said, "you can't beat the bandwidth of a truck full of Blu-rays, especially with bandwidth caps.
That said, I've gone digital with games that aren't too large (Minecraft), ones I know I will play the heck out of, like Diablo UEE. And going digital with MMO's/MMO-ish games makes sense, DCUO and War Thunder are digital only on the PS4.