For one, as attractive as this type of recessed handle may be, they are entirely non ergonomic. Imagine the pressure exerted on wrists that try to lift this much weight in the twisted positions suggested by the inward-facing orientation of these handles. It is much more natural to be able to approach them in a supinated position from the outside of the case as opposed to the inside.
Not to mention production costs would go WAY up. How in the Hell would they manufacture that thing? My version coming soon...