When initiating a new conversation, the number you add to it appears blue if they can receive iMessages, green if not.
If for some reason iMessages can't be delivered to the receiving party at the moment. Text messages are used as a fallback for them. If you disable the fallback mode. It won't be.
The whole thing is kinda intuitive, and works really smooth IMHO.
- As for iCloud, their Windows client is a little lackluster. For example, the only way they can sync your iCloud calendar on Windows is by creating an Outlook plugin. So the only place I can view my iCloud calendar on my Windows computer is on the Outlook app.
- As for Music, the web player is completely fine. Not any less optimized than the Apple device versions. Would actually go further and say it looks MORE optimized than the mess of iTunes/"Music" on the Mac. Apple's native music app on the Mac has never been good.
- As for Maps, I don't think I've ever seen a web based version of it. Haven't seen a windows app variant either.
Edit: made it easier to read
Having both in the same area of the keyboard makes my brain happy.