Please everyone read or at least skim articles before posting. The article literally says, that it’s “an honest bump” to allow typical usage like web browsing and multitasking.

Ubuntu experts at OMG Ubuntu characterize the latest revision in RAM specs as “an honesty bump.” In other words, the core OS isn’t really more demanding on system resources this time around, but Canonical recognizes that with the latest Gnome desktop, modern web browsers, and typical multitasking workflows, users should look at a minimum of 6GB of RAM.