When I open my Gmail account the other day, I noticed a 'New Feature' link on the top right of the page. When I clicked on it, it took me to the page where it explained what the new feature is. It turned out that Gmail is slowly releasing POP3 client feature to the Accounts !

This is what I've been waiting for ! Now you can read ALL your POP3 email accounts in one convenient place with the User Interface that you've known and loved, i.e. Gmail

Here is the screenshot from the feature page, which you also can find here:

The only thing is, not all Gmail account will get this at the same time. Google is releasing this slowly. If you see the following item in you setting, than you have it: