Originally Posted by
nerd
Finally got around to verifying this with my tablet and Sony Bravia:
Turned off the router, and then cast the tablet screen to the TV. So it matters not at all to Miracast whether there is a router in the picture.
The issue is I don't think the Roku Screen Mirroring solution is actually Miracast, or at least not 100% Miracast compliant. Notice through Roku it's never actually advertised as Miracast, though it uses Miracast-compliant hardware as a requirement for Windows devices. Not all "Screen Mirroring" solutions are Miracast.