LOL please be smart guys....how can they have all digital content when not EVERYBODY has fast internet speeds to hold that much bandwith? Have you thought about that? And also why would sony parter up with phillips to develope a new type of DISC to hold up to 300g/b of information? Come on guys be smart now
I think this needs to be said since you seem to enjoy trolling..
A disc that size is not meant for gaming. It is meant for data storage. Why? Because the current disc readers are not fast enough to process that size of discs fast. I recall reading an article awhile ago there they have developed a technique to create a 1,000 TB disc (there were several technology sites that picked up the story)... Sorry, that is actually to put 1,000 TB onto a DVD. It has to do with the method of burning the disc.
Large discs, at least for the forseeable future, are not meant for gaming. The time to burn onto these discs are quite extensive. And when you put a disc that size into a disc reader, the unit has to essentially read the entire disc and determine what is on it, and piece the bits together. While the 1,000 TB is, without a doubt, for data storage.. Even a 300 GB disc isn't meant for gaming. It's meant to put movies, files, etc... on.
I, myself, prefer to have an actual disc. That being said, your analogy of the 300 GB disc is way out to lunch

I also enjoy having some things digitally too. As games get bigger, console makers need to increase the hard drive space.. 500 gb isn't much now when you think about it.. An avid gamer in a 5 year period could have 50+ games... At 10-25gb a game, chances are that 500 gb hard drive won't be enough. I have CoD and BF4 on discs, but I have Lego Marvel digitally.
See this link for the 1,000 TB disc information:
http://gizmodo.com/researchers-have-found-a-way-to-cram-1-000-terabytes-on-531549229