Microsoft and Canonical worked together on the Windows Subsystem for Linux, which is basically reverse Wine for running command-line linux executables under Windows. It properly launched with the anniversary update, so that might be what you were thinking of.
OS: Windows 10 64 bit Professional
CPU: Intel i5 4670K@3.4GHz... for now @4.6GHz with a quick and dirty (yet stable) OC. May get faster in a bit before the end of time.
RAM: 16GB (Down from 24 GB after some was given to siblings)
GPU: Radeon Vega 56
CPU: Intel i5 4670K
RAM: 16GB (Down from 24 GB after some was given to siblings)
GPU: Radeon Vega 56