Google announced that for storage space, 15 GB is now shared between Drive, Gmail, and Google+ Photos.
Life gets a bit easier when your Google products work well together—whether that’s inserting a Drive file into an email or sharing a photo from Drive on Google+. As this experience becomes more seamless, separate storage doesn’t make as much sense anymore. So instead of having 10 GB for Gmail and another 5 GB for Drive and Google+ Photos, you’ll now get 15 GB of unified storage for free to use as you like between Drive, Gmail, and Google+ Photos.
I’m sure there are some downsides and people are going to complain about something, but this isn’t bad for a free service :)