YouTube launched an opt-in, experimental home page on Thursday, and it has to do with personalizing users' ability to really, really suck the productive time out of their days.
Following other channels is made easier, sure, but the real customization comes in the easy inbox, all videos appearing on a subject and not just the most recent, and ... oh, here's YouTube's blog to break it down:
"Some of the enhancements include:
Combined list: Merges your subscriptions, friend activity, and recommendations into one easier-to-scan list (and a “Subscription uploads” tab if you only want to see subscriptions).
Don’t miss a video: If a channel uploads four videos in a day, you’ll see all four instead of just the latest video.
Delete anything: Hover over any video you don’t want to watch and click “x.”
Or just grey it out: Videos you’ve already watched will be grayed out so that even without deleting, you’ll know where you left off.
Help me refind stuff I just watched: Your homepage will include your recent likes and favorites so you can easily get back to them.
Easy inbox: Links to your inbox (personal messages and comments) are front and center.
Load much more: Watch older videos, all without leaving the homepage."