Getting back to my phone after looking at the portable Tvs, however it’s it’s difficult to fiddle with shader parameters. Some shaders (e.g. Hyllian, Megatron) slow down to a crawl in the gui (less than 20 FPS), but are full speed in-game. Tested with glui and ozone.
Known problem with a known fix…or 
Seems like games in certain resolutions cause it to lag. I have a couple keyboard macros set up for when I’m working on shader presets and they will fail when certain games are open because of the timing being off. I notice it, for instance, mostly on Bally Midway games.
I did a bunch of things including setting the vsync swapchain to 1 (it was up before). Now the FPS-counter still goes down in the gui, but it feels much smoother regardless.