Hi npet -
Thank you for being a proud owner of the FCV585 and for your question. I will answer your question the best that I can, but it will be vague in nature, because we keep our product development confidential.
In general, our R&D begins working on new products and new features immediately after the release of a product. We take into account feedback that we receive from our dealer network and customers around the world. So you can feel confident that the next generation of the FCV585 is in the development stages, however I do not have any specific information or time frame for release at this time. Your best bet is to come back to this forum and check under the Furuno News section or under the Company section of our web site. In the mean time, if you have any specific feature requests for the next generation, this is a great place to post your ideas.