Once again... 4.5" does not always mean the form factor will be bigger. People seem to ignore this despite the fact that a few people on here are basically waiving there hands up and down jumping and screaming about the fact that the phones physically might not get any bigger.
People don't like change. My ex-girlfriend worked in tele-sales for a local cable company in my county. She would call people to offer them additional cable packages that were less, sometimes by almost $50, than what they were currently paying. You would not believe how many people apparently didn't want extra services for almost $50 less than they were paying simply because they didn't want the company to change anything on their bill.