"To get a useful computer it needs to be probably a million times more complex, so a full-scale useful factoring machine is still at least two decades away, " he said.

BBC: Quantum computer slips onto chips

Sony even admits that the Double Density CD-ROM is a product of the moment that will become about as useful a piece of computer hardware as grandma's sewing machine as soon as read-write capable DVDs are widely available.

FORBES: Sony Establishes New, Obsolete CD-ROM Format