So am I correct in guessing that people are using an IR receiver and some sort of HT or universal remote for this? One of the big things that's kept me with the SmartHub Plex for Samsung is that it is all neatly integrated into a single remote. The TV controls the AV receiver through HDMI-CEC and automatically powers up and selects gear as needed. I really can't stand watching broadcast or cable TV, so an AppleTV sits as the default video source because it is nice to be able to AirPlay stuff at the TV's, but I could see supplementing or replacing that with a different device. The big thing is that the Samsung remote runs almost everything, except the AppleTV and maybe some audio settings on the receiver.
It looks like I'll be replacing one of the C's with a regular non-Smart Samsung so it'll be an interesting time to experiment.
Yes, the pain points with the Chromebox are definitely suspend/resume and the lack of an IR receiver.
I bought a Rosewill MCE remote and used the receiver that came with that for my Harmony One. I have been beating my head against trying to map keyboard keystrokes from the Harmony and after way too much digging around have come to the conclusion that the issue is that the MCE Keyboard hack that Kodi and users of other PHT ports use does not work currently with the port for the ChromeBox for some weird reason (probably not a priority for Mark Walker as it is a project he maintains in his spare time).
I can't just use HDMI/CEC as I have other devices (ATV, Legacy Component/TosLink switch, HD-VHS ...) so I'll just have to wait for Mark to fix it when he has time.
As for the suspend/resume for now I couldn't be bothered for 15W of power savings. It's still the heating season in Canada and an extra 15W of heat at 100% efficiency is better that the mid-efficiency furnace does (and yes, our electricity is still relatively inexpensive)