8.7 megapixels is above the resolution of Ultra HD (consumer 4K)
"These guys [Apple] are really, really good. This [iPhone] is different." --Mike Lazaridis, RIM co-CEO
I think there will be a 4.8 inch (or close) flagship iPhone 6. I also believe there will be 6C that will feature a 4 inch screen but will have nearly the same internals, and perhaps a plastic case. The differentiation will be more like what the retina iPad mini is to the iPad Air. The 5S will be discontinued. The 5C will remain.
4.8 inch, metal iPhone 6, A8 $199
4 inch, plastic iPhone 6C, A8 $99 (could retain the 5S internals, A7 etc., but doubt it)
4 inch, plastic iPhone 5C, A6 $0
Remember that greedy Texas engineer that sued Apple for making iPhone/iPad? The iPhone is not a PC. The iPad is not a phone. What he needs to sue is Samsung and many Android phablet makers.
The 5c was never meant to be Apple's "cheaper model". That false notion was just a media fantasy. Apple has long sold three generations of iPhones at any one time. According to Anandtech, "The iPhone 5c leverages the entirety of the iPhone 5 hardware platform, but moves from a glass + aluminum construction down to a more cost effective glass + polycarbonate design." (http://tinyurl.com/mocfr26) It is clearly positioned as Apple's middle-tier offering and fulfills the same role that the 4s served when the 5 came out. The 5c is priced no differently than the 4s was priced at that time. See http://aaplinvestors.net/stats/iphone/pricing/
I agree with your assessment regarding 2013 & 2014. Although come 2015, I wouldn't be surprised if Apple drops the numbering scheme and just has the follwing (for argument sake);
iPhone S - 4.8"
iPhone C - 4" & 4.8"
Well you are one of the lucky ones, but you'd be the first I ever met. Every poweruser I know has frequent trouble syncing their iPhones. I have spent 5+ hours on the phone with apple support in the last few years trying to resolve the many sync issues for which there are no solutions on the apple discussion threads after years of the same problems. These problems are mostly revolving around syncing photo libraries with iPhoto but I also often have issues with keeping music synced with iTunes. Eventually songs disappear on my or my wife's iPhone. It takes hours to erase and then resync large libraries of music and photos, even when skipping WiFi and going direct with USB.
I realize it isn't happening to everyone, but the fact that this Apple Discussion, https://discussions.apple.com/message/23029822 , has over 90,000 views (and there are others), tells me I'm not alone. Apple has one KB article telling you to just not sync so much stuff. Excuse me? They sold me a 64 GB iPhone. I would like to use it.
I have not been able to sync music or photos for the past several months (plus it has removed songs I already had on the device!). Doing a full restore fixes the problem for a few days, but restoring all my content takes days and I get error messages over and over. I'm so frustrated with Apple, over this and other issues (like the huuuge number of bugs in iPhoto), I don't even like to walk in to Apple stores anymore.