There are a whole heap of 'un-released' samsung prototypes as part of this legal case too (here just a few versions of one phone from 2006: http://www.groklaw.net/images/Samsung-1.jpg ) - many more variations of other phones where produced the in the same style.
Don't be tricked by the Apple produced image showing the phones that Samsung released before the iPhone - that is not all they (and many other manufacturers) were working on. Motorola A1000 (http://www.heise.de/altcms_bilder/62452/3_hires.jpg ) came out long before the iPhone - and followed many of the same conventions.
The Motorola A1000 didn't really follow the same conventions as the iPhone. For one, it used a stylus, and had 6 face buttons.
The iPhone has one face button. Most Android devices initially had buttons for call-related functionality, though most manufacturers have dropped that for either software buttons in the UI or static capacitive "Buttons" on the bottom of the device. The only similar convention that the Motorola follows as the iPhone is that the touchscreen is the primary input device.
I was talking purely on the hardware, as I'm not familiar with the phone enough to comment on the software. But from that perspective, you definitely are right, a lot of "modern" OS features in for the default iOS and Android shells are in that phone.
Don't be tricked by the Apple produced image showing the phones that Samsung released before the iPhone - that is not all they (and many other manufacturers) were working on. Motorola A1000 (http://www.heise.de/altcms_bilder/62452/3_hires.jpg ) came out long before the iPhone - and followed many of the same conventions.