No, that's a chambered guitar.
It's easier though to build a guitar like that in three layers -- a thicker center section and thinner top and back. And if you use contrasting woods, it looks great too.
I was actually assuming there were f-holes in the top. My mistake for not specifying that.
What I'm considering is, when I finally get into the building of bodies next year, making a Les Paul but really hollowing out the body and adding f-holes. Maybe the body would be a little bigger, almost be like a mini-archtop.
What would be the effect if the wood was thicker than a standard semi-, like 1/4"-3/8", but without a center block? Would the feedback be overwhelming, or would it be there at all due to the lack of vibration in the wood?