Yeah, why on Earth should Apple give us choice? They know best, they should've picked one size and rammed it down everyone's throat. And we would have liked it and said "please, can we have some more?"
I was a little surprised because of how Apple didn't seem to like the fragmentation of different screen sizes. But, here we are with a 4", 4.7", 5.5", iPad mini and iPad. iPad Pro next year?
I would have gone with 4.5" and 5.3". 5.5" is just a little difficult to deal with when in blue jeans and you're sitting down. That said, I ordered it.