Try Unreal Engine 4 on your PC

[MetalSoup]

Here are two Unreal Engine demos you can try running on your own PC. They look pretty damn good, in my opinion.

Elemental
Cave
Reflections
Multiplayer FPS Demo
Realistic Rendering Room
Temple

You can change the resolution by bringing up the console with ~ and then typing "SetRes 1920x1080". You can display the FPS counter with "Stat FPS".

Other useful commands:
exit
RestartLevel