I have OLED (a9g) in my main living room. It's bright enough (like the other guy said, OLEDs are actually brighter than what LCDs were a few years ago) for regular content and non critical viewing. I do have to angle the blinds to not have direct sunlight. I can see reflections on my TV though, mostly on dark content.
If it's a real concern, I'd suggest an LCD with good reflection mitigation.
Sony XBR-77A9G / Panasonic DP-UB9000 / Marantz SR7011 / Def Tech 9060 Series