"We have found that among Australians with both a computer and a smartphone, even the tasks most associated with mobile internet use - from getting directions to checking the weather - are actually still actually more commonly performed on the old PC or laptop," said Roy Morgan Research general manager for media and communications George Pesutto.
For example, 68% of double-device owners use their computers for email in an average four-week period, while 44% used their smartphones.
Even tasks that seem a natural fit for mobile devices were more likely to be done on a PC: 28% of that group used their phones to obtain maps or directions, while 33% used their computers.
"For example, while a third of these doubly connected people use their computer for researching a product or service to buy in an average four weeks, only around 1 in 10 use their smartphone - and 80% of the smartphone users were also using the home computer, indicating that the phone is mainly considered a supplementary device for this activity, rather than a replacement."
8968 Australians aged 14 and over with both a PC and a smartphone were surveyed between April 2012 and March 2013.
It would be interesting to see how the reported rapid uptake of tablets comes into the picture.