Gigatron? What is that? Never heard of it..
Lots of boxes have 4k ability. Z7, T2, not sure about the Buzz, my Vu+Zero4k...but its useless for this type of service. IPTV will likely never have 4k streams. At least not without services going to h265 and spending some bucks on their infrastructure. It would seem unlikely to me that any of these services would spend that kind of money considering they could be shut down tomorrow. This is a relatively short term game. Having legit 1080p streams is a big step and most providers are still struggling with that even!
how about this box? hearing its as good as nvidia shield.
Mecool M8S PRO L 4K TV Box Amlogic S912 Bluetooth 4.1 + HS - VOICE REMOTE CONTROL ( 3GB RAM + 16/32 GB ROM )
It doesn't matter as there currently is only 1 provider with 1 4k channel. You're going to replace the box in 1-2 years anyways.