Having an angular underside like that is a common design trick to make something look slimmer than it really is. Having the borders wider makes it easier to engineer that. Several other keyboard makers have used that trick, including Cherry for their MX-board 3.0. Plus, the bevels allow you to get a better grip when you need to lift the case.
But if they are serious in making the keyboard slimmer, they could switch to Cherry-profile keycaps... Just sayin'.

But glossy plastic... Please no! That is as outdated and tacky as blue and white translucent plastic by now. I hope that this is just an early prototype.
I also don't like the slanted sides, especially the feet at the back. It reminds me of Razer BW...
I hope they are not thinking "Razer is selling more than us, we have to design our keyboards to be more like Razer". No, Razer sells more because 1) their keyboards are cheaper, and 2) they are more aggressively marketed.