I can use ChromeCast to stream from my laptop to my TV for everything else. But it won't work to stream from the Slingbox site.
After hitting "Watch", a new window opens fro the "SlingPlayer" and content from SlingPlayer will not stream from my laptop to the ChromeCast on my TV.
I understand SlingBox does not support streaming from a Laptop over to the TV via ChromeCast. Why not? This seems like logical functionality to have.