The 55" ones are hellishly flaky in their HDMI 2.1 support for 4k @ 120Hz as well. They're refusing to let me return my Q70T (bought on Jan 4th) because it's beyond their standard 28 day returns policy, but their tech support person admitted to me on a live chat that it doesn't support 4k @ 120Hz properly for PCs (which was my main reason for buying this model) - "only game consoles".
So I've wasted a huge amount of money on something that's not fit for the purpose I bought it for, and Samsung are doing nothing but giving me standard stock "As it's beyond 28 days, there is nothing we can do" responses.
