Literally a .5 inch larger phone than you already have. Camera will be marginally better, 4G (nearly all androids already have this), and NFC (all androids have this). iOS 6 = looks the same as every iOS ever made with a few new features you will probably rarely use.
/pass.
To me, the OS is about productivity. I don't want to spend 3 weeks re-learning how to find things I knew how to do with ease before I upgraded. I want to get on and do what I need to do with my apps, and every now and then go "oh wow, they made that easier", or "that's a cool new feature". Incremental change for their OS (be it iOS, or OS X) is a great way to do things ... just keep refining it.
I for one, really love my 4S, but if the back is to change from the very fragile material used (I drop my phone a LOT), to the brushed steel look they are showing here, I see it as a good thing. As for the longer screen (if indeed this is the real thing)- why not? We have all seen the explanations as to why Apple made the phone the size it is, and the thinking behind it. If it aint broke, don't fix it.
In response to all the "Android has this, and Windows phones have that" posts .. surely it would be easier for you to go and buy one, and be done? I don't think Apple necessarily look at it that way .. As we can see from most of their other tech introductions, they find something that they can do better, and do it. It isn't about what other tech is capable of.
Having said all that, if Apple were to listen to all the posts like those listed in here, we'd end up with the Homer car (http://onscreencars.com/wp-content/uploads/2010/01/TheHomer.jpg) and not a device that is predictable in nature, stable to a much larger extent than others, and an ecosystem that is second to none.
/end rant.