What is the appeal of Google Apps for business when every major web hosting provider these days provides unlimited email accounts?

Google apps for Business is a LOT more than just hassle free fire-and-forget email.

With recent Changes, google apps accounts can now utilize and access (with the domain administrator's permission) all of google's web services. Over 50 in fact.

Think company:

Pictures (picasa)
Videos (youtube)
Groups (Google Groups)
Documents (Google Docs) With scripting
Websites (Google Sites) With Scripting
Calendar (Google Calendar)
Phone number (Google Voice) -assign a company number to an apps account.
Chat (Google Talk) now with video Chat and ability to call phones from email using your google voice number.
Database (Fusion Tables)
Website stats (google analytics)
Maps (google maps/mymaps)

And many many more.

There are enough services to put your whole business in the cloud with google apps. Email is just one of them. But it's damn good email.

What is the appeal of Google Apps for business when every major web hosting provider these days provides unlimited email accounts?