If you're taking part in the iCloud.com beta, you can now upload photos directly from your computer. Whereas photo uploads were previously only available from within iOS if users toggled the option on in their iCloud settings, Apple seems to have flipped the switch on an upload option within the iCloud Photo Library web app.
In the screenshot above, you'll find the option available in the upper right portion of the screen right next to the 'select photos' option.
The ability to upload from a computer further brings Apple's cloud offering into line with competing services like Dropbox. If you would like to know more on how to enable iCloud photo uploads and join in on the beta fun, be sure to check out our guide to using the iCloud Photo Library.