manene, on ATR's not only do you have the EFIS displays, but also clockwork cards, and these need to be checked, as it's quite possible for the related compass system to be working fine, the displays and SGU's to be hunky-dory, but the card to be jammed.
Likewise, you also need to check the standby instruments.
Software errors are, of course, always possible.
Anyone who says "You don't need to check modern stuff nowadays" is an accident waiting to happen. Don't trust - verify!
Likewise, even in a 747-400 @ JFK, it's quite possible (and prudent) for the pilot doing the taxying to look out and, in normal turns, the other pilot to run through a quick check of the instruments.