A:Answer AndyM - The Q80A offers Object Tracking Sound which utilizes 4 speakers to project sound around you, our Quantum Processor 4K and Quantum HDR 12X, and Wide Viewing Angle technology which optimizes your picture with a lighting system that automatically senses, reacts, and adjusts to the brightness of the space you're in. Starting with our QN90A TV, you will gain Object Tracking Sound+ which utilizes 6 speakers, our Neo Quantum Processor 4K with Quantum Matrix Technology and Quantum HDR 32X (HDR 24X on 50" QN90A), and Ultra Viewing Angle with anti-reflective technology which provides wider viewing angles, reduces glare and enhance color. ^Gina