The term "seasoned pro" and skill sets vary greatly depending on who you talk to, but this is my experience. Although I am senior level designer, I have to say that my Treehouse subscription has been worth more than I had expected. When I first logged in after receiving a promo on membership cost, I admit to have felt that there wasn't much for a UI designer and front end developer between basics (through responsive design) and programming (especially related to mobile design), but I was wrong.

What lessons can we learn from the mobile landscape that can help the future of desktop/tablet operating systems in the future?