There were actually two penalties that didn't get called on that play in New Orleans. Robey-Coleman was also guilty of helmet-to-helmet contact. And that is reviewable.
NFL football is meant to be played outside, period. Green Bay plays outside, so does Buffalo, NE, the Bears and several other "cold weather" teams. Minnesota used to play outside as well.
But the dome in New Orleans, as well as the others was built so the city could bid for and maybe host a Super Bowl. Although New Orleans hosted three SBs before the dome opened. But, look at the list of SB locations in the past. Look at the northern cities where it was played. Detroit, Minneapolis, Indianapolis and New York. New York was the only one of those played outside. You won't see that again.
Future Super Bowls through 2024 will be in warm cities, some in domes there.