Successful User Experience and User Interface Designs are inherently intuitive and simple. Not necessarily simple in the “less is more” aspect alone; but rather in that the designs focus on essential tasks – and provide an experience which allows for completing those tasks easily and efficiently.
With this in mind it is not surprising that many modern Desktop UI Designs are being influenced by Smartphone UIs; for they, by necessity of constraint, address many design challenges which can be easily overlooked in Desktop UI Designs.
Ultimately, I believe this convergence of the Mobile and Desktop paradigms will lead to better User Experiences. In fact, I have been leveraging many mobile concepts in Desktop UIs for some time now to much success.