After a solid week of use since its debut, here are my personal impressions of how iOS 8 has refined and streamlined the way in which I use my iPad on a daily basis.
Today is Looking Good
The improved Notification Center is by far my favorite feature of iOS 8 on iPad. The now fully-featured Today screen is finally at a place where it should have been years ago: as an integral part of the iOS experience and adding a whole new spectrum of usability to iOS devices.
On an iPad, a device typically chock-full of apps and games, this feature is even more appreciated. From the lock screen I can get an overview of the most pressing news stories (via News Republic), pop culture or meme-inspired articles that are perfect for passing a few minutes (BuzzFeed), a much more attractive weather report (Yahoo! weather), buttons for launching different functions in Evernote, customizable app shortcuts with Launcher, and a shortcut to where I'm up to in the book I'm reading with the Kindle app. It acts as a real hub of activity, allowing me to view my apps at a glance rather than closing and opening each one systematically.
AirDrop between my iPad and my MacBook (running the Yosemite beta) is also a long-awaited feature I'm happy to see added to iOS 8, and is a much more direct way of transferring files between the two. Answering calls on my iPad if my phone is on charge is also a massive plus, meaning I rarely miss those urgent calls from work when my phone is in the other room.
A combination of the new-and-improved Notification Center, the updated Spotlight search, and a rejuvenated Siri will definitely silence some of the critics that previously questioned iOS' productivity or speed of use, as the home screens have become more of a directory than the be-all-and-end-all of the iOS experience (to me at least).
Better Luck Next Year
I'm still waiting for the Control Center to allow for some customization in the same way that the Notification Center lets you edit widgets (for example, a button to turn off data easily) and take proper steps towards becoming a mini settings menu. Hands-free Siri is a great touch, but until Apple comes up with a way to make it work without the constant use of a charger it's not particularly helpful unless you're sitting next to the plug socket.
iOS 8 has taken great steps in moving towards achieving true multi-device connectivity, as well as making the whole interaction process a lot more multi-faceted. As more apps add support for notification widgets, it'll become even more capable.