CES 2013: The tablet that turns itself lumpy
When you can't feel individual keys on a touchscreen device it can be hard to type at speed.
That is why Tactus, a company based in California, has developed technology which can turn a typical flat tablet screen into a real keyboard with bumpy buttons.
The keyboard rises from the tablet when needed, before disappearing when the typing is done.
Micah Yairi from Tactus explained how it works.
Video journalist: Dave Lee
Watch more of Dave Lee's reports from CES below
FIGHTING JET LAG
PROTECTIVE PHONE 'GOO'