I think Apple are at a bit of a 'stalemate' in terms of design at the moment. Everybody seems to moan about the slippery (agreed) and curved design of the 6/6+ but realistically I think a 4/5 style in that size would be horrific. What's really needed is some kind of happy medium and I think that's what we'll get... and then people can moan about that for 2 years.