That design at the top of this page is a render on Rick Dickinson's flickr account. I don't know, but I suspect that's the same Rick Dickinson who designed the case of the ZX Spectrum and the Vega plus, amongst other devices. It's also a year old, so I guess it predates the Vega plus design.
If that keyboard is intended to be displayed on the LCD, that's a very peculiar shaped LCD that would probably need to be especially commissioned. Instead they've gone for a simpler design with a rectangular LCD and conventional push buttons. That posted flickr image is a pipedream, something to kick-start people thinking about a new device, and the outcome of that was the Vega plus.