What's peculiar about this is that the Radeon RX Vega 56 is a desktop card rated at over 200 W. Over 200 W is an awful lot for laptops. That's why you can't get a GeForce GTX 1080 Ti in a laptop, for example. AMD's desktop Vega cards are pretty aggressively clocked, and with appropriate binning and scaling back the clock speeds and voltages, they might well be able to make a nifty 100 W laptop card out of it.
Of course, if you're going to go that route, then you want some sort of discrete switchable graphics so that you're not burning a ton of power at idle. Between Raven Ridge and the Vega 56 card, it might be a nifty gaming laptop--if good drivers exist for it. Maybe they will, but the way AMD has handled their laptop drives of late gives significant reason to be skeptical of this. At minimum, I'd say not to buy the AMD option unless and until regular drivers appear on AMD's web site. Some initial driver that may or may not mostly work and will never be updated is not a serious option.
It's interesting that they offer both Intel and AMD CPUs and both Nvidia and AMD GPUs. I'd somewhat expect it to be an Intel/Nvidia combination and a pure AMD combination. There's no intrinsic reason why you couldn't use AMD for one part but not both, but it's unlikely that anyone will bother to make the drivers for discrete switchable graphics for such a combination.
AMD has the hardware that they could be competitive in gaming laptops again, for the first time since before Maxwell arrived in 2014. Right now, they don't have the drivers. I don't know if Acer is expecting AMD to offer appropriate drivers; one hopes that they wouldn't bother to offer such a laptop for which useful drivers will never exist. But many laptop vendors are notorious for offering insane things in laptops.
I'm not saying that the Acer laptop will necessarily be interesting. But there are already a lot of good gaming laptops based on an Intel CPU and an Nvidia GPU. (And also a lot of bad ones, but that's another discussion entirely.) I'm not sure if the Acer laptop heralds a return to competition, or if it's going to be a stupid product that even AMD fanboys ought to shy away from.