SSD
The Solid State Drive is a thing of beauty. It can basically cut down previously massive load times into a matter of seconds, as well as cut down the resources developers have to duplicate to create a massive open world thanks to its dramatically faster read speed over traditional hard drives.
This all basically means you’ll get faster load times, and developers can either make install sizes for games dramatically smaller, or make their open worlds bigger and better than we’ve ever seen with more detail and things to do.
Cerny also provided a crazy example of the practicality of SSD’s allowing players to install just a single-player part of a game, and not the multiplayer, or deleting one bit and not the other after the fact.
But the cost! Thankfully, SSDs have dramatically reduced in price over the past couple of years alone. Again, a consumer price isn’t going to be the same as what Sony pays on a mass-production level, but a 1TB SSD now costs about $99.99 for a PC.