Well you were getting the short answer.
The long answer is you will get it to work with the cast screen option, but one who travels like me and just getting the chromecast thingy well I'm very disappointed in it working with my Pro-HD.
If the hotel requires your to sign on to a web page to have access to the internet this will not work for the chromecast dongle. You will need a router setup first, then login through that first to get the dongle.
I'm still looking for a better way, because sometimes the hotel outlet does not work because everyone going wireless. You can also use your phone hot spot but then you run into data usage. What a mess i know. its to bad Slingbox does not support Pro-HD device for this product.
I'm going out of town for 2 weeks. I own a Chromecast, Slingbox Pro HD, and an iPhone 5 vr. 8.1.3. I'll have an HP Chromebook 14 with me. Will the SlingPlayer iPhone app ($14.99)! control my older Slingbox Pro HD? I'll also use the Chromecast iPhone app with this setup.
THANKS IN ADVANCE