I might be using video once in a while, but action and candids for the most part.
GPS and wifi are also just 'extras' for me. I really like the specs on the 5D's focus system (41 cross points vs 1), 61 focus points (vs. 6D's 11), 1/8000 vs 1/4000 max shutter speed, and 6FPS vs 4.5FPS. Still trying to justify a $3500 purchase though...
Check that video out about 5D mark iii VS 6D .. I love that show.
"Take me to the Brig. I want to see the "real Marines". " -Chesty Puller