Chromecast with Google TV is now serving full-screen, auto-playing Chicken Tender Wrap ads
(www.androidauthority.com)
No, that would allow someone to take over the device.
However, it does wake up to whatever app was last running so the difference is likely semantic.
Mine are always in the Plex app, even on TVs that have Plex apps because they cannot return to the exact same Plex screen.
It's weird that people are dropping hundreds or thousands on a tv only to cheap out on the device they are presumably using to stream their pirated content.
I have Apple TVs that have outlived their original TVs. From what I'm reading here many people are on their third or fourth chrome cast. Silly.