Kind of a shame it's not dynamic depending on the players screen resolution and choice of a scheme in the visual options panel.
For example, on my 24" widescreen, it looks like it could easily fit 3 times as wide of a bar, thus displaying up to 30 icons in one row. My guess is that they wanted to use an easier one size fits all instead of using a more dynamic type of system that could expand depending on screen resolution if the user permitted it to do so.
The saving grace however is that since combat is turn based, it's not like we are under extreme pressure to move between the 3 hotbars rows in any great speed. It would just be more convenient to be able to do so with configurable hot keys.
