Goovis headset PQ vs. OLED TV?

Has anyone used a Goovis headset and can compare it to an actual (e.g. LG OLED flat screen TV). how does the PQ compare? What size screen does it look like? From how far? They give impressive specs, but they're probably exaggerated. I'm not planning to replace the TV, just to get an idea what the Goovis experience is like to watch whenthe TV is not available.