Can someone explain "Files" to me who is participating in the beta. does io11 finally allow you to save any file format to your phone now from safari and view in a file manager like android allows you to?
More or less, yes. I mean, you could already do this to some extent on previous versions of iOS. There's still the problem of not being able to download filetypes that Safari can natively handle (like .mp3 i think). We should file that as a bug! In any case those can at least be worked around with the share sheet to a third party app or Workflow.
And there's no download manager like desktop Safari. But you can, say, tap on a .zip and download it to the Files application from Safari- and even preview the contents of the zip file from Files, and then attach one of those files inside the zip to Mail to email it.