Toshiba claims they will be able to increase harddrive density by 10 times over 5 years using Nanocontact Magnetic Resistance, or NC-MR NC-MR uses an enormous difference in magnetoresistance which is achieved when two magnetic materials are situated close together and connected by a contact point that narrows to around 1nm. A prototype thin-film NC-MR structure fabricated by the research group exhibited a magnetoresistance ratio of 140% a room temperature.
Seagate is promising the start of a transition to 37.5 terabyte drives starting in 2010 using HAMR(heat-assisted magnetic recording)
Other sources indicate the transition to HAMR will not start until 2012
Brian Wang is a Futurist Thought Leader and a popular Science blogger with 1 million readers per month. His blog Nextbigfuture.com is ranked #1 Science News Blog. It covers many disruptive technology and trends including Space, Robotics, Artificial Intelligence, Medicine, Anti-aging Biotechnology, and Nanotechnology.
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