I'm not sure how powerful it is which cannot tell from the looking. If it's the same powerful as the existing PC, I found All-in-one PC now is less than $500. So why do we need to have this nice-looking but still heavy machine? If it's super powerful, then a lot of engineering issues need to be taken care before how it looks like.

EDIT: I'm sorry, it's fully expandable. But sometimes the OS may not support the hardware expansion that much or become very low performance.

But anyway, I agree that we should make PC more customizable and more pluggable if it's doable.