You may also want to get a handle on the new method of managing your photos, called iCloud Photo Library - which gives you the ability to store all you photos in iCloud and then view and manage them from all your devices.
Here are some articles published in the last week or so on these topics. Hopefully they will help you with your decision on whether to upgrade to Photos and whether to turn on the iCloud Photo Library feature in iCloud Photo.
iPhoto to Photos
How to Switch from iPhoto to Photos on Mac - Gotta Be Mobile
Managing libraries in Photos - Macworld Australia
iCloud Photo Library
How to Set Up iCloud Photo Library On Your Mac, iPhone, and iPad - Know Your Mobile
Cloud shopping: Is iCloud Photo Library the best value for your dollar?