I have never really used the labels in Gmail, and it was quite interesting to see the recent introduction of 'tabs' in Gmail. Even though the concept of folders has always been in the Outlook (which has a Category field similar to labels) and is also used in Apple (which uses the concept of mailboxes), Google always stayed away from this. Can someone point to the underlying philosophy for this, and whether this is some attempt to move closer to the mailbox or folder concept.
As the Gmail website says: "New customizable tabs put you back in control so that you can see what's new at a glance and decide which emails you want to read and when."
This would seem to be comparable to the folder/mailbox + filtering rules, or does it encourage some other behaviour? In fact how Google allows you to drag things to different tabs seems to be an attempt at creating rules based on user behaviour rather than having to set rules from the template like how Outlook or other mail applications work.