(I'm not expecting it to be possible--though eventually XDA will probably get it. Just that that's what I want out of my tablet and phone; it's why I use Nexus devices for my Android stuff.)
The integration into Amazon's ecosystem is a major selling feature, trying to fully tie it into two ecosystems would be a mess.
You can use other video services though, Netflix works great. For music there is Pandora and Spotify.
You can certainly use other services like Netflix, Hulu, Spotify or Pandora. Amazon probably loves that those apps are available for their device. The basic reason is that once you go looking for something not available on those other services (which happens frequently) your only other real choice is buying it from Amazon.
I have a fire, and it was immediately obvious within a few minutes it's designed around consuming content from Amazon and spending more money with them. While it would be absolutely a mess to fully support two app ecosystems I think it's naive to think that Amazon would have supported any system that didn't primarily direct funds back to them. They can sell these devices so cheaply as it doesn't matter if they profit from hardware. They've designed everything in such a way as to derive their revenue from sales of media.
It's a selling point because it's easy and it's automatic. Similar to iOS. Out of the box you're ready to go and if you buy something one place it shows up in the other place too. If you're a Prime customer there is a ton of video content waiting for you for free. It's a walled garden, but other than Apple it's the most well done walled garden.
I'd prefer top of the line hardware with stock Android (mostly so I can test stuff), but that's not the business they're in. They made that very clear with Bezos stating they don't want to make money with selling their devices, they want to make money when you use them.
That said, I'm seriously curious if Amazon is still using a highly modified, improved, Android 2.x fork for their release version.
I buy Android devices for stock Android, not for a manufacturer skin.
You're very much in the minority. People like iOS because it's integrated and easy, that's the same thing Amazon and Google are going for as well.
"What comes on Nexus devices" is what I consider a stock Android product. That's effectively the selling point and why it's so fantastic.
I was looking for that info, where did you see that?
Yep. My Nexus 7 is far more useful than the Kindle Fire. I actually like the Fire, but it's very much based on consuming stuff from Amazon. No Google apps is kind of painful - no Gmail, no Reader, no Maps... Also, the Nexus 7 handles switching back and forth between English and Italian with aplomb. The Fire doesn't seem to at all, and I don't know if they are changing that with this latest update - Amazon is a fairly US-centric company, whereas Google got exposed to the world a lot more via Android.
I wish Amazon would stick to content. I think they're better at it than Google in terms of a selection of music, video and of course books. But I don't think they're as good at producing a device that is designed to be flexible and used in ways that aren't 'consuming Amazon content'.