I do the exact same thing with NextPVR, Channels, and Kodi. It works as a stopgap for my media center PC in the living room, however it does not provide as nice of an experience as the Channels app on my Shield TV. The time shifting is terrible. And changing channels takes up to 15 seconds.
I would gladly volunteer to beta test and troubleshoot either a Kodi integrated PVR, a standalone Kodi addon, or a dedicated Windows PC app (or all of the above, I'm greedy), so that I can truly take advantage of Channels in my media center PC.