An instant replay' feature lets you play back the past defined time period of gameplay as video.This has received an upgarde to 4K Ultra HD, at 60 FPS and with 5.1-channel audio. In-home GameStream (stream your game to say a living room TV).

With GameStream Co-Op, your friends can simply watch you play in a low latency 1:1 stream, take control of your game with mirrored controls and help you with a tough boss fight in The Witcher 3, or play along-side you in supported multi-controller games like Trine 3, Gauntlet, FIFA 15, NBA 2K15, Mortal Kombat Komplete, and more (you need at least a 7 Mbps Internet connection on both ends for this to work).Recording gameplay is as easy as bringing up the overlay and clicking a button. There is a new broadcast feature (stream your gameplay live to Twitch and YouTube).

There is an updated in-game overlay - this brings access to streaming, recording, and screengrabbing features.

Okay so NVIDIA has added a number of features over the past couple of years tied to their NVENC hardware encoder that resides in your GPU for GameStream, ShadowPlay, and most recently the beta for Share and GameStream Co-Op.

That means the software (which the majority of people feels is bloatware) will become mandatory to be able to download first wave drivers. The bad news, Nvidia is forcing (in the near future) its Game Ready drivers to be downloaded through GeForce Experience. If you are up-to date just hit check for updates in GeForce Experience. The good news - if you grab the latest drivers then you will have noticed that GeForce Experience has received updates.

Nvidia gfe driver