In general, the only people who still think they want a 4-inch iPhone are those who do not yet own a 4.7-inch iPhone 6 or 5.5-inch iPhone 6 Plus.
When the iPhone launch in 2007, its 3.5 inches screen was considered large. Things changed quite a lot since then. Have you ever since someone having a conversation with a large phablet to its head? Ridiculous is a overstatement!
Ruminating... 