DigiTimes wrote a nice article about how the DIY PC component market is evolving in response to the changing PC market, you can read it over here.
The PC market as a whole is contracting, leaving manufacturers desperate to find transitional opportunities. PC DIY component makers are adapting to the changing market and in general have a positive outlook for the potential of new areas, such as audio-visual products and other types of peripheral product lines.
For example, Antec has launched a new specialist store in an effort to boost sales of its AV brand AMP, while Thermaltake is focusing on AV accessories for gaming competitions, revenues from which are expected to rise by 30% or more in 2013.
Industry analysts put margin rates for AV accessories at 40%, far higher than the 20% for DIY components. The potential market is also very large and is therefore regarded by manufacturers as an important new way to boost both revenues and profits.