Re: "On a slight tangent... "
"Is it just me who thinks it's bizarre that so many new formats have to look like CDs? Why?! "
Standardisation is a good thing. The standard size disks fit into standard sized cases and standard sized storage units.
Not to mention there's probably significant production benefits in having it be the same size - even if the contents of the disk is a brand new technology, you still get savings by being able to use the same size moulds/presses/whatever-else-they-use-for-CD-fab