Quote: Originally Posted by
gameboy 
i've run into some issues trying to market pcs to boat folk, as you can get a decient color gps/chart type setup for less then 600$ and get modules that plug into it, for things like radar, sonar, etc. alot cheaper then a pc w/software/hardware and such

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Using a touch screen I think would be the biggest improvement over the marine electronics out there.
As i've noted in another post, the amp consumption issue is also a big concern. Most of the marine electronics take very little power. Not a huge concern for a power boat, but it is for a sailboat.
There is also a lot of resistence by marine electronics manufacturers to abandon NMEA 1083 in favor of NMEA 2000 which is ethernet based. This, I think would be a great reason to go pc.