Can anybody comment on why such a big track pad is useful? I'm using a 4.5 year old MacBook Pro Retina right now and I feel its trackpad is the right size. Aren

Can anybody comment on why such a big track pad is useful? I'm using a 4.5 year old MacBook Pro Retina right now and I feel its trackpad is the right size. Aren't the new trackpads easier to touch by accident?