Shader Model 6.0 needs new compiled bits and proper application support to work. Do not expect any automatic improvement. DXIL compiler is still in a preview state. It will take a while to made it ready for (games but on only) production. Meanwhile the upcoming Windows 10 update (aka Creator Update aka Redstone 2) will introduce DXIL compiled bits support (since the standard is well defined). SM6 will help developers reducing GPU (pixel and compute) shaders overhead and will allow more aggressive shader optimization by the DXIL compiler itself and by the graphics drivers. It will also remove some no-more-optimizations from FCX which are useless on today's GPU. It will also allow easily custom toolset and compilers addons by third party software-houses (mostly big studios only) and easily porting between different platforms and API (Vulkan and Linux/Mac-OSx mostly, since MS and sony console shading languages are de-fact HLSL clones).