Soon after the GPSMAP 496 came out, there was lots of chatter about what
they will be doing next. It seems their newly-released Marine portables are
providing a hint. http://www.garmin.com/products/gpsmap525/

Two words: satellite imagery

This has some value (if somewhat limited) for boats but it would be a
home-run to use in the airplane in VFR.

I cringe at the thought of the pricetag for updates though...

Marco