I actually would appreciate a wall oven...
My sister has one, and it's electric which in this day & age seems to be the most practical type especially if you want self-cleaning and are probably (like most of the time she uses hers) to use convection...
Then, likewise, I would have my gas cook-top & hopefully in an area where it will be a bit easier to keep clean as well as the surrounding area that I can't get from my stovetop...
Gone would also be the bending and stooping to get things in and out of the oven, but I suppose, maybe the wall oven's grass, with the lifting and too-high o0r too-low prodding that design is brought with may not be as green...
I can kindof see how inept the installation of must be attributed to, just to accommodate different heights, to see the drawbacks, as such is seldom standardization regulated, in some homes...
As for the cook-top, I like the knob placement on mine, below the burners, and I used an electric one, or two, one my sister's and another a brother of my wife's who had a built-in appliance kitchen and actually in Israel...
So, a horizontal placement, off to one side, might take getting used to, as would all these other configurations you used to see, such as them mounted on race-hoods or walls, and General Electric keeping its famed push-button operation in existence there, until you got standard knob-placement like the myriad competitors...
Getting back to this wall oven, it would be nice to see this all-knob concept be put back to universal use... I truly hope the emergence of this brand and how convenient and efficient it's proposed to operate, in this mainly-all-electronic age happens!