Default [Q] Chromecast on Ethernet connected PC

My PC is wired to my home network via an Ethernet connection. I do not have a WI-Fi connection on this PC.

I have installed, the Chromecast Windows 8 desktop app, but when I click on it, it searches for a wireless connection and returns a message that it can't find one.

I can connect to the device using either my Windows 8 laptop, or my Android tablet, but would also like to do this from my desktop PC, which is right next to the TV on which I have connected my Chromecast device.

Does anyone know if there are any plans to enable this, or is there a workaround to allow me to connect from this PC?