The most recent Gmail update will make it easier to handle some of your accounts from one unified front. You can now view all of your accounts in one inbox and you can browse conversations in non-Gmail accounts just like you normally do. The supported accounts include Yahoo, and Outlook.
Google is also ready for smarter searches, which means that when you start typing a word to search, you get better auto-complete actions to choose from. With this update you can also preview larger attachments and you can one-tap save to Google Drive.
The update is rolling to devices at the moment.