When Barcelona announced plans to revamp the Camp Nou at a cost of €600 million, the sporting advantages were obvious. The capacity is being upped from 99,354 to 105,000, and, more importantly, a roof is being added to cover the seats around the entirety of the stadium, ensuring that opponents encounter a wall of noise regardless of the significance of the match.
I'm not an Arsenal fan, but you don't have to be an Arsenal fan to appreciate just how green the pitch at the Emirates is. Look at that thing. It's glorious.