I wonder what the price of such a thing would be, more than most can afford probably.
Did you read the title of the thread, and did you read the article which I have linked to? The answer is there. So don't "wonder". In case you are too busy to read it, here's quote from the article:
"The optical system to record and read 5-D is very similar to the current DVD system," says James Chon, a co-author on the research.
"Therefore, industrial scale production of the compact system is possible."
Now that the method has been demonstrated in custom-made multi-layer stacks, the team is working in conjunction with Samsung to develop a drive that can record and read onto a DVD-sized disc.
Dr Chon says that the material cost of a disc would be less than $0.05 (£0.03), but there are a number of advantages in moving to silver nano-rods that would bring that cost down by a factor of 100.