What is Connected Standby?
Connected Standby is a new low-power state in Windows 8 and Windows 8.1 that features extremely low power while maintaining connectivity to the Internet. Connected Standby is designed to be the primary off state for a capable PC—similar to how pressing the power button is the common off mode for a smartphone. Connected Standby is exposed and named to the end-user as “Sleep”.
The design of Connected Standby brings the smartphone power model to your Windows PC. A Connected Standby PC is able to instantly resume and is always connected to the Internet. Apps in a Connected Standby PC are automatically updated while the system is in Connected Standby so that critical information—including email and messages—are already synced to the PC when it is turned on.