For me it has nothing to do with web browsing itself. Rather those benchmarks highlight the low latency low load tasks.
Which sums pretty well your desktop experience, where your cpu is not 100% loaded, not even on one core. But you can still tell a difference between a slow cpu and fast one by how responsive your actions feel and how fast applications load.
These are not unimportant. This is how you spend bulk of time behind the computer. Running [badly optimized] interactive programs.
For web browsing or doing word processing most people now use laptops,tablets or phones which are significantly less powerful. So a computer now means someones £300 smartphone too.
Intel wants to make people think they need some new expensive desktop CPU to do these tasks with - its not only about getting sales from AMD,but getting their own CPU users to upgrade too.
I still have an old PC at home which is used for office purposes and its over 5 years old and does a lot of the tasks Intel listed fine and I have zero need to replace it for such light usage,which is typical of most normal usage I have seen.
The PC market is shrinking,with gamers being one of the brighter spots in the market. People are keeping their laptops and desktops for longer and longer as the performance is "good enough" for most tasks. People are increasingly using phones to replace many tasks,and as phones have become bigger people are buying tablets less and less.
Most people in the world are content consumers,not creators,and its mostly word processing and basic office tasks which are the most intensive creation tasks people do. Or are you telling me that a word processor which worked fine on a Q6600 10 years ago suddenly needs a £400 CPU for writing a single page document?? Just because one number looks higher than another does not equate to meaning anything in the realworld for these kind of easy to do computing tasks.
We are enthusiasts,so we like comparing all these numbers,as its our hobby and we like new shiny!!