This book doesn't really get into great depth on that sort of thing. Certainly chapters three (which discusses SVG) and eight (which discusses CSS media queries) will provide useful background information, but it doesn't get into stuff like designing for touch input vs designing for mouse input in any great detail.
However, I think the answer to your question is going to be "sometimes, it depends."
For further background in this area have a google for 'responsive design' and 'mobile first design'.
