How to download orginal photos from iCloud Photo Library to PC? I'am an iPhone + PC (Windows/Ubuntu) user. Nowadays, I'm used to download photos from iPhone to local folder, sort them and then backup them by myself (by syncing to remote disk and burning onto bluray discs also).

I like an idea of iCloud Photo Library + optimizing a storage on iPhone. For me, this also means that original photos are moved from iPhone storage into cloud, so I won't be able to download them via USB.

So, will it be possible (and easy and comfortable) to download all new photos (100+ at once) from iCloud Photo Library to local disk on PC? I mean a) download and keep on iCloud (copy), b) download and delete from iCloud (move)?
Go to https://www.icloud.com/#photos.
Go to Albums -- All Photos folder.
Click Select Photos on top-right of the page.
Select first photo and Shift-select last photo.
You should see all photos are selected now.
Click Download in top-middle menu.