On its own, Ultra HD isn't a compelling reason to upgrade unless you are a video buff, especially since you would have to sit extra close to the set or have an enormous TV to notice the difference between 4K and a lower-resolution screen.
He said he did not want his officers to feel "pushed down the route" of issuing a fixed penalty notice, "if there's a better resolution to be had which will better address the needs of the victims and the community - and crucially stop the offending".
Notice that you cannot use a stylus with the iPhone, so the resolution of interactivity is lower to accommodate the fact that fingers are fatter than styli.