I think Slydemon is at a point now were it simply can't be made any better for VFR flight. So how about adding synthetic vision and IFR approach plates say the gCAP ones?

I don't see Synthetic Vision as a tremendously useful addition to our current 5" device. It's not even clear how useful it is in a 7" device (with a much more powerful processor) for VFR needs. Is it impressive? No question of it. For the moment, you'll need to buy a device that costs about three times as much if you want it.