6
That said, I think the Watch will increase interest in the 6+. Many people do not want to pull out a grossly oversized phone 20 times a day to check their meetings, texts, notifications, etc. However, there are times when anyone would appreciate the larger size (web browsing, reading ebooks, etc.). With the Watch, we can now follow most notifications on our wrist without pulling out an oversized phone 20 times a day, while still benefiting from the larger screen of the 6+ when we have [private] time to ourselves to browse the web, read an ebook, etc.