3 (or more) things it copied...
Let me see:
Pinch to zoom (Apple invented this)
Predictive text entry using a software multitouch keyboard with little letters that pop up to show what you are typing (apple innovated this, though Stylus driven keyboards have been around since the Plam and Newton)
Double Tapp to zoom in and out .(again, Apple)
Kinetic Scrolling (apple invented this)
Application tray (Symbian, Palm had this waaaay before they did)
a curated App store (Apple innovated this idea long before Android or anyone else)
That's just off the top of my head.
it's funny when the naysayers try and deny that Android copied large portions of other OSs look and feel, and when it's shown that it did, they cry foul!
Until Apple came along, smartphones used styluses, resistive screens and scrollbars and so forth to control functionality.
Apple re-thought that experience and did away with the Stylus, and used gestures and pinching and tapping etc and were hugely succesful because of this.
Android was originally pitched as a Blackberry style OS, and it wasnt until IOs was debut that they changed direction. Suddenly it was much more like an iphone and it's been getting more so like that since.
Microsoft have been bold enough to completely eschew the widgety desktop like experience that Apple, Android and Symbian use and have IMHO a fresher more original approach.
Therefore, if Microsoft can spend the R&D dollars to come up with somthing new, why cant Google?
Answer: Because it's cheaper - and since they give away the OS in return for advertising revenue, they have little or no incentive to spend $$$ doing somthing truly ground breaking or new.
PS: Dont forget Apple also had a patent portfolio left over from it's R&D on the Newton Messagepad, let alone the iphone.