Suppose because as it's in GB it's big news. Something similar happens on a regular basis over here, rubber bullets, water cannon, bit of gunfire, the odd blast bomb. Suppose we're used to it, we generally refer to it as "a bit of bother" rather than riots or "a war zone" as the media seems to be fond of describing things over the past 2 or 3 days.
Just looked at the aerial footage from Peckham, Lewisham etc, a few burning building etc but not a fire engine in sight. Odd.
Certainly plenty of people about taking advantage of unofficial opening hours for PC World, Currys etc.........