The fourth generation Apple TV has significant hardware upgrades compared to its predecessor. The new Apple TV 4G will feature tvOS, which includes support for third-party apps and games.
The Apple TV ships with 2 GB of RAM on board. Other specifications include:
64-bit A8 processor
32 GB or 64 GB of flash storage
10/100Mbps Ethernet port
HDMI 1.4 output with 1080p resolution