Gran Turismo Tech Demo: Real-Time Ray Tracing & Replay Movie Editor

[SimTourist]

loads of GDDR5 unified memory is pretty neat, and there is no PC equivalent, still.

It's okay for a console, but the PC style split is better suited for heavy OS work and general computing, as well as standard DDR type memory being cheaper, hell you could easily put 32 gigs of DDR3 RAM in your PC back in 2011 for literally pocket change. The immediate advantage for split ram setup is that the GPU is not stealing bandwidth from your system memory right under your nose.