TVs are like buying hand made carpets. They put them all side by side in the store and you can see the difference between the $500, $5000 & $50,000 carpets easily. But at home you have only one and nothing to compare it to so the $500 will do fine.
This doesn't work when you're talking OLED vs LED/LCD.... the OLED just blows away everything else because it is such a different technology. Even my wife who doesn't pay attention to this at all, asked why our bedroom TV (46" Samsung LED) had the ghosting/spotlight effects when a dark scene came up. She NEVER would have noticed if we didn't have the 65" OLED in the living room, where you don't get that issue.
For the non-tech savvy, OLED panels have individual pixels that are independently controlled so you can have a solid black pixel right next to a bright white pixel, which cannot be accomplished by backlit LED/LCDs...... it is the most stunning visual experience you can get right now.
I remember when Sony debuted the first 11" OLED screen at the CES in 2004, for a low low price of $2500...... I thought, holy crap, I want that but not for the 10s of thousands of dollars an actual (large) TV would cost...