I had to google for eMMC, and then I had to discard some of the first hits. I finally got some good info.

So the "internal slot" is going to be not a "slot" at all? This sounds like the RX-51 will have the same configuration as the N810... So that very likely means no full size SD card slot either, only a mini or a micro.

Hey, SDHC cards are not dead, you know! Most of the current generation HD camcorders are using them, so I see a few more years of these cards being available...