Agreed. Around 110"-120" is as small (sounds silly saying small with these sizes) as I'd consider vs. the larger OLEDs. My main point was that before OLED/4k/HDR, the difference in PQ wasn't as pronounced between panel and projection and pj setups under 100" made more sense. These days, not so much. The lines will get even more blurred as OLEDs, or whatever replaces them, get bigger. What about when we get 100" panels? Currently, unless you're prepared to drop a decent chunk of money on front projection with screens over a certain size, I don't think it's worth it.
An 88'' OLED panel is £30,000. I think we're pretty far away (years) from the 100'' panel being availble for under £30,000.
And even an 88'' panel is tiny compared to a 110'' screen. http://www.displaywars.com/88-inch-16x9-vs-110-inch-16x9
Especially if we smack some letterbox content on it.
I think 110-120'' is the sweet spot because the bigger the screen, the lower the brightness, and in PJ world we need brightness for HDR and options for dynamic tone mapping to look good.
The only 'larger' OLEDs I can think of are the 77 (£4000-£6000) and the 88 panel (£30000).
I don't consider a 65'' OLED big at all, especially compared to projection. http://www.displaywars.com/65-inch-16x9-vs-110-inch-16x9
I do agree in that the gap with HDR content is bigger than what it was with plasma. I think an ALR screen + a good projector would = with the lights off a plasma picture, there or there abouts. Now you need to treat your room and buy a JVC projector probably to get close to the OLED black levels. Also dynamic iris is now not as useful.. we need high contrast panels to map HDR and cannot rely on just closing the iris.