The majority of fighting on the European front in world war two and even the wars taking place in Iraq and Afghanistan are primarily urban combat where suppression fire is even more important since troops lack cover and engagements take place in short distances.
[Source] [url]http://www.csmonitor.com/2004/1109/p01s01-usmi.html[/URL]
That's one battle, mate. I don't know if you've seen Iraq or Afghanistan, but they are almost entirely rural, and most of the combat takes place in isolated but strategically important chokepoints out in the countryside.
That's not to say there isn't a lot of urban combat, but your article merely discusses the new challenges it presents. The combat in the countrysides of Iraq and Afghanistan is nothing new. That's how we've been fighting for centuries. Urban combat presents a new beast, and that's what your article is talking about.
Get out from behind your computer monitor for a bit, mate. All these numbers and figures are well and good, but nothing beats first-hand experience.