Looking at the pix, I think calling it a boat is a bit of an exaggeration. It is however not a bad concept for the holiday family, but I would want a much longer boat box before I took one on the water.
Looked at it at the LIBS this year and said it needed lenghtening to the man, he knew that but was clear that it would need a new mould and that was significant Dosh. TBH I think he might have been a bit fed up with people saying what a great idea it was but needed improving for real boating use such as a Tender. It did'nt appear as robust as a standard glass fiber tender, but would be fine if looked after reasonably.
For any useful stability ( and I used to carry a hard dinghy just like that on the cabin top of a Corribee j/r!), it needs to be around 1.2m beam at the waterline. The further this width at the waterplane is carried fore and aft, the greater will be the stability again. So a curvy, multichined design may not be the most efficient way to ahieve stability. Stability ( or righting moment) increases exponentially with beam, length for length.
Selling that curious floating suitcase as a toy, to people who hadn't given any thought to boating, sounds like a recipe for tragedy. The space for an outboard is worrying!