I noticed this new photo icon on my task bar today... Didn't realize when it was there!
It's the new photos app, Apple wish this app to replace iPhoto and Aperture, so it must be good enough.
The first thing it asked is to upgrade the iPhoto library and Aperture library. I picked iPhoto it takes fairly long time...
Finally... It looks like the iOS photo app indeed.
It has pretty powerful editing features.
Shortly after I run the photo app, my MacBook crashed. 😞 not sure if it's related to this app though.