And holding it at a store is just that, holding it at a store. Carry it around and do your normal deal like you did with your older phone and many are going to get frustrated and return it. For people who aren't that mobile it will be fine. Mobile people, well it's going to present lots of issues. A cardboard cut out isn't the phone. The cardboard doesn't weigh 6 ounces, the cardboard doesn't have a case (which will make the phone weigh more). You'd know with an exact copy of the plus, 6 ounces, plus a case, then carry it around for awhile. Disappointment beckons.
I would like the extra battery out of the additional options but I honestly think in the real world the battery life between both phones isn't going to be as substantial as Apple lists it out to be. More screen = more power required.
The 1080p at these screen sizes is marketing more than anything else. On my 5, vids are crisp, and clean, never, ever, had a complaint. I could care less about the camera. I surf, listen to music, text sometimes, talk on the phone, and control my entire house with the phone. If I want to do real browsing or video playback outside of work I want a 10" screen or above. I'd happily trade my iPad Air for a 13" version in a heartbeat.
My 5 was an increase in size over my 4 and IMO, the perfect size between surfing and portability. It's never a burden to holster, to put it in a pocket, cup holder in the car, etc. I'm actually concerned a little over the size of the 6. I think it will be my upper tolerance of a cellphone for daily carry. I picked up a 4 recently (coworker's phone) and kind of missed the size. I think more than anything Apple needs to work on the bezels. They are got damn massive on that 6+ And a deal breaker. I think a 5" screen is the max I would ever sign on for.
This is more of a cellphone (portable, edc, transportable) to me that's smart. I don't want a mini tablet that doubles as a phone. It's just too large in a pocket, looks like straight dork ville on a belt holster, and is just generally too cumbersome to take everywhere. Would be great as a second phone if you also have something smaller to tote when you are busy moving around your city, activities, work, leisure, etc.