It won't mean much of anything once even the most basic screens exceed the retina display criteria.
The app usually costs a whopping $49.99, but it’s currently on sale for $24.99, so get it while it’s hot.
or you know, don't.
1. Force of habit, if John Doe is used to running red lights since the junctions nearby are always empty he might plough into someone absentmindedly when at an unfamiliar junction.
2. Ambiguity, a red light is a red light, a “clear junction” is open to interpretation
I’m sure there are plenty of other reasons against the idea, but the above two seemed enough to me.
A bug in the hand is better than one as yet undetected.