So even the COIN RETURN translucent plastic lights can change color (and I suppose be part of the attract mode lightshow)?!? Pretty cool.
And are the external volume controls only for the headphone jack, or general volume?
Will the headphone jack be easily removable? Jacks tend to be not the most robust and fail in every day components all the time. So I could see how, in the operator setting, they might have to get it repaired occassionally, or even opt to remove it altogether while on location (and hence need a secure means to seal up the gap by the vacated mechanism).
The home users, however, will love it.
Given all that has to be considered in terms of production, durability, and maintenance, considering what's going into it (jacks, volume controls, bill validator, multicolored LEDs), to do it PROPERLY, I could easily see it taking a year from design to build.