Emulating a Chromecast on a Windows desktop
Solution 1:
Google Cast is a proprietary technology, much like Apple AirPlay.
Luckily, there’s AirServer. It claims to serve as an endpoint for:
- Miracast
- Apple AirPlay, including FullHD support
- Google Cast
It’s not free though. At the time of writing this answer, a regular end-user license is 13,99 € (excl. VAT).
(Miracast requires a compatible WiFi adapter with compatible drivers [NDIS 6.4+].)
I haven’t used the software, so I cannot say if it works well.