I don't disagree with that, but remember that the development of each of these smartphones is made more than a year ago with the profits of the last smartphone. If LG is just scraping by with the Nexus 4, and Apple and Samsung are ultimately forced to lower their prices to remain competitive, can we really say that anyone in this industry is going to have the money to keep pushing the technological envelope?
On the other hand, maybe the big players have exhausted themselves of their creativity for the time being. After all, how creative is an extra row of icons on the home screen? Or an even wider, bigger version of last year's phone?