Video of Octane Render rendering in real-time on 8x GTX580s

I just saw a very impressive video on Youtube, showing real-time rendering of a complex interior scene with Octane Render using eight GTX 580s. Octane Render has very recently improved its "direct lighting/AO" kernel which includes a new ambient occlusion preset and a diffuse indirect lighting option (there are now separate sliders for specular, glossy and diffuse path depth and a slider for AO distance) so that it is now capable of rendering very realistic looking interior scenes extremely fast:

http://www.youtube.com/watch?v=CZ1IRQTqMMY

Screengrab from Youtube:

Some observations:

- in contrast to the type of scenes that is usually used to show off unbiased renderers (wide open outdoor scenes with shiny cars and lots of direct lighting from a skydome or sun/sky) this is an interior scene that is mostly lit by indirect lighting with many glossy surfaces

- the scene in the video contains more than 1.3 million triangles

- rendered at very high resolution (1500x1000 pixels)

- perfect scaling with number of GPUs (99-100% extra performance per additional GPU)

- while navigating through the scene, the image remains remarkably clear and recognizable without ever degenerating into a pixelated mess of big, blocky (and often black) pixels

- convergence to a noise-free image is extremely quick

It's not hard to imagine that this renderer will be truly real-time with the upcoming generation of GPUs (according to Nvidia, Kepler will be more than twice as fast at path tracing as Fermi, just like Fermi is 2-4x as fast as Tesla (GT200) thanks to caches and other improvements (see http://www.youtube.com/watch?v=0IC2NIogWR4) and AMD's Graphics Core Next will be much more focused on GPGPU computing than previous architectures). These graphics can be rendered noise-free in real-time at high resolution with techniques like adaptive sampling, image reconstruction, compressed sensing (a hot topic in medical imaging currently), edge-aware filtering of indirect lighting (e.g. the a-trous wavelet noise filter), extraction of spatiotemporal coherence with reprojection, path regeneration, reusing samples with frame averaging and frameless rendering. Rendering complex, 100% photorealistic scenes in real-time is much closer than commonly believed and cloud rendering will play a key role in accelerating this process.

UPDATE: another interior animation rendered on a Nvidia GTX 590 with Octane Render's new indirect diffuse lighting/AO kernel: http://www.youtube.com/watch?v=O2Aufjr44g4Hi
Rendertime per frame: ~1 minute, 1024 samples per pixel (see screenshot in this thread). This is absolutely amazing...