I'd like it to be a primary device where you can also use it with an iPod Touch optionally for just rare moments when you want to either take a decent photo or

I'd like it to be a primary device where you can also use it with an iPod Touch optionally for just rare moments when you want to either take a decent photo or interact with a screen. For this to work well for me personally, though, I think Siri needs to be better.