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'Our key insights include encouraging initial demand, with +11% of iPhone users 'very likely' to purchase an Apple Watch this year,' the report said.

It also found that the launch could cause major problems for traditional watch firms. 

'Regular watch wearers are among the most likely to order an Apple or other smart watch, suggesting high displacement rates for traditional watches from smart watch adoption'

It says young consumers are substantially more likely to buy an Apple Watch than older consumers, and that brands likely to be worst hit include Fossil, Seiko, Casio, Rolex, Timex, and TAG Heuer are the watch brands they wear today.

It says the mid-range manufacturers could see major slowdowns in sales.  

'We see greatest risk to the mid-tier watch category.

'The US watch market totaled 61mn units in 2014, with 11-12mn units in the 'mid-tier' ($150-$1,000 price range). 

The mid-tier appears most vulnerable because of the price point overlap with Apple Watches ($349-$1,099).'

It also found that men were more likely to buy the watch, which goes on sale on April 24th - but not by much.

It says young consumers are substantially more likely to buy an Apple Watch than older consumers, and that brands likely to be worst hit include Fossil, Seiko, Casio, Rolex, Timex, and TAG Heuer are the watch brands they wear today.

It says the mid-range manufacturers could see major slowdowns in sales.  

'We see greatest risk to the mid-tier watch category.

'The US watch market totaled 61mn units in 2014, with 11-12mn units in the 'mid-tier' ($150-$1,000 price range). 

The mid-tier appears most vulnerable because of the price point overlap with Apple Watches ($349-$1,099).'

It also found that men were more likely to buy the watch, which goes on sale on April 24th - but not by much.