In the near future what will make real time rendering engines get closer to photo realism? Majority of engines have the same features like:
Physically Based Rendering/Lighting
Dynamic Reflections
Shadow Mapping (also PCSS)
Ambient Occlusion (SSAO, HBAO)
Bloom & HDR
Depth of Field
Lens Flares
Motion Blur
Particle Effects (Fog, Fire)
But what will really make things look life like? Will most techniques become physically based to improve quality? Are there any new breakthrough techniques?