Until recent I'd never bought a gaming-related Collector's Edition anything, but for whatever reason I got the OW Collector's Edition, and, OMG, that was cool!
So now I am a Blizzard Collector's Edition believer.
I am gathering, though, that in order to play on release day, you need a digital version TOO, because (at least in my case), a physical CE is not going to arrive via FedEx/UPS on release day.
I don't necessarily mind paying an extra $60 or whatever just to get the CE and play on Day 0 but ... eh ... it is 3 pretty nice pizzas we're talking about.