I think it's hard to determine before you let some people own one & see. I remember when iphones first came out and there was a lot of attention on the size of

I think it's hard to determine before you let some people own one & see. I remember when iphones first came out and there was a lot of attention on the size of the phone. Mobile phones started big & awkward & for a long time (10-15 years) size was the number one feature & differentiator. There were no inherent advantages to size. It fits in your car, it fits in your bag, it fits in your pocket, its comfortable in your pocket... It became a habit to think of smaller sleeker phones as advanced. But, they got a lot smaller then they needed to be for us to carry them everywhere. There was just no tradeoff to size (other than price) so we kept going. We (or at least I) carried around walkmans that were much bigger. It would be interesting if the standard size becomes >5". That implies it took us a fairly long time to figure out the optimal size.