I got the Q60 today. Honestly, I really didn't need it but the chrome bezel on my KS8000 was driving me crazy and I wanted to go 55" (from 49").
Initial impression is that it's a pretty big improvement. Very sharp, good color, even backlight, very bright. I still need to watch a 4K movie for a full impression but so far so good.
A few concerns and nitpicks though. I fired up Red Dead Redemption 2 and it looked great but I noticed the moment I start moving, something was off and there was a blur effect on the character. Eventually, I found the same setting that ABT wasn't aware of - Game Motion Plus which is buried under External Device Manger (???). Turning that setting off, everything now looks good. So for you gamers, make sure to disable that setting the very moment you go into Game Mode.
My big concern is the lack of options. Coming from the KS8000, you had options for Smart LED (Local Dimming), Black Level and HDMI UHD Color. All gone from the Q60. I'm particularly worried about the missing Smart LED/Local Dimming setting. On the KS8000, for any setting higher than Low for Smart LED, you could noticeably see the screen brighten and dim during scenes. That's a deal breaker for me and too distracting to enjoy a movie.
I'm hoping perhaps the dimming is improved as such where they felt they could remove the setting but I would still like the option. I saw someone mention on a previous model that it was moved to the Service Menu.
After watching a movie tomorrow tonight, I'll post an update. Fingers crossed...