It's crazy. The watch pocket in a pair of jeans is an anachronism dating back to 1902 when it first appeared. Although, famously, Steve Jobs did once pull an iPod nano out of the watch pocket of his jeans. (Here's the YouTube video where he does that at about 1m56s.)
Anyway, nothing much has changed with jeans in over a hundred years. And because many guys prefer to carry their smartphone in a jeans pocket, getting that smartphone out, quickly and easily, when needed can be a problem. I/O Denim, a Kickstarter project, has the solution, Their new jeans, 100 percent cotton from North Carolina, premium denim (hence the price), feature a special pocket on the left-hand side, in between the knee and the hip along the seam. The pocket is big enough to handle any of the iPhones with a slim case and also most Android devices. For now, men's cut only and limited sizes.
Problem solved. Very cool indeed.
Check It Out: I/O Denim Jeans Solve the iPhone 'Pocket Problem'