&gt; I really don&#x27;t understand why are they chasing RT.<p>1. The highly-parallelizable nature of RT is ideal for many-core architecture we&#x27;re heading toward. Note that the PowerVR hardware used in the demo has 4 cores, needs no fans, and uses 10x less power than a traditional rasterization-optimized GPU.<p>2. The simplicity of implementing physically-based effects leads to a much easier time for artists.