Hesitating between Canon 5D Mark III and Nikon D800

Greetings from Bangkok! I went to the Nikon showroom yesterday and I was not very impressed by the fact that i had to insist to be able to hold a Nikon body or lens which were all shelved behind windows! Quite a difference from the day before at the Canon Showroom where all bodies and lenses are available for you to try. It had been a long time I had not held a Nikon body and i have to say it would take me time to get used to the ergonomics after Canon.

I have used both brands many years ago with the Nikon FA, F801, F90 and Canon AE1, A1 and currently i am using the 7D with 17/40 f4L, 24/105 f4L, 70/200 f4 L IS and the 300 f4 L IS. My shoots revolve around scenery, landscape, people when I travel around Asia.

My question is: on an HD 55 inch TV will the difference in sharpness/resolution show with a Nikon D800 over a Canon 5D Mark III?
Many thanks for letting me know.
Thierry