I decided to upgrade to the iPhone 6 Plus from the iPhone 6 (4.7). It's a huge difference in screen size and bulk. It won't fit in a pants or shirt pocket, and is extra bulky on a belt pouch. I love the extra screen real estate (and better battery life) but after living with it 24 hours I decided to go back to the smaller (more easily carried) iPhone 6.

If I really need that much screen I can use a tablet or full computer. Mobility in a phone is more valuable than the "phablet" features, IMHO. It's all a trade-off.

It would be nicer for using navigation apps though.