Node.js and the new web front-end
This new javascript wave in which we eschew the needs of the consumer is going to start costing companies big. Processing power, memory, and power consumption are still a pretty big deal in the mobile sector and offloading all these responsibilities to build the view client-side are a huge mistake.Engineers that make their lives easier at the expense of the customer will find themselves in a very empty and very optimized echo chamber.  Users will be found elsewhere dealing with products that are faster (for them) and teams clamoring for how they can continue to improve the experience with each iteration.