One of the biggest benefits introduced by Intel's new Haswell architecture is the reduced power consumption. Power consumption and heat are directly related, so reducing power consumption directly impacts heat production. Thanks to lower power consumption, HP will be able to produce a fanless Haswell-powered tablet later this year.
Engadget spotted a fanless HP tablet on stage at Intel's Computex events. While HP wasn't publicly showing off the tablet, they did confirm that an official announcement would be made later this year. Details on the actual product are slim, but you can expect to see fanless tablets and notebooks coming later this year.
It's a bit surprising as most suspected the fan couldn't be dropped until Broadwell showed up on the scene. We'll keep you posted when an official announcement is made by HP.