Jquery will be implemented in eCart 6, this is the current project we are working on. After eCart 6 is released, Data Bridge will be updated to use Jquery validation as well.
Not entirely true. A responsive design uses different settings based on specified criteria. There are a myriad of different criteria that can be used. The most common is the view port, that doesn't necessarily mean that is the only criteria that people want to use.
In Data Bridge, we will be looking at creating responsive designs using WURFL. We will also be moving from using the deprecated MySQL libraries to using MySQLi and other improvements.