It seems very interesting, especially if the price drops below the 200$ range.
I guess the 2MB NOR RAM would be to stock the device firmware, or for eventual firmware update.
I'm more intrigued by the 512MB SDRAM, such a quantity would more likely correspond to the storage memory.
On the other end 2MB of actual RAM, if these 2MB are RAM, would be far too low.
My guess is that the datasheet is either incomplete or got some facts wrongs.