Yea it would be expensive. Well more expensive than the GPDwin. It's more dependent on how much AMD would charge for a dual-core Raven Ridge. The price would also go up again if we could use HBM2 for the entire system, but having HBM2 as shared system/vram would be amazing.
Getting a cheap (Read: smartphone stock panel) LCD that supports FreeSync would be the hard part, I'm pretty sure they don't really make them. And if something had to be made, and since we are in dream-world where none of this is actually going to happen, I'd like a 720p OLED FreeSync (30-120hz) panel. Naturally that won't happen, but at the very least I'd like to try to get some type of LCD that can support adaptive sync.
It's also worth pointing out that the GPDwin as it is right now could fully house a 6" LCD and still have a tiny bezel. A 7" LCD would indeed be larger but I don't pocket my GPDwin as it is now. Well it is pocketable in a jacket pocket, but in my jeans, it's a back pocket only thing. So pumping it up slightly to 7" would make it larger but definitely not anywhere near a laptop size. There are 7" baytrail tablets that are still "pocketable" in the same sense as the GPDwin now.
Additionally, the reason I suggest going to 7" is so that the battery could be thinner so that the top part of the clamshell wouldn't be too large.
For anyone that *uses* the GPDwin, it's very obvious there are two problems that need to get solved.
#1.) The battery on the bottom of the case adds to the heat of the plastic shell.
It's extremely noticeable when charging the device and not even playing any games that the GPDwin is physically very warm to the touch.
So if we move the battery *behind* the LCD, we move a major heat source away from the mainboard and also away from the place that is constantly held by the user.
#2.) By moving the battery to the LCD, that means you can free up the entire bottom portion of the device to the Heatsink+fan. Additionally, like I show in the crappy 3d model I made
the front of the device can be where air is pulled in. So even if you were to lay the device flat on a surface, it would still properly breathe.
I'm not suggesting to make the device too large. But at 7" screen *provided that the border of the screen could be extremely minimal* the device would be 10%~ larger
720p 7" screen would still be very nice to play on. And if we had 20,000 mAh battery with a 14w AMD Zen part, then we'd be golden.
Also if AMD Raven Ridge doesn't work out, we could go with this:http://ark.intel.com/products/95451
At least with the CPU on this, lots of heavier emulators will finally be fully playable.