Compared to 5-year-old machines, multitasking in general will be twice as fast, 1.9 times faster than browsing the web and editing photos on Adobe Lightroom 2.3 times faster.
Graphics-related tasks such as 4K video rendering will be significantly improved thanks to two reserve cores. Intel said that rendering videos would be 14.7 times faster than computers since 2012. 4K 1-minute and 46-second videos encoded in HEVC with a capacity of 440MB will make the 8th generation chip take 3 minutes to render, in when the old 5 year machine will take 45 minutes.
Talking about 4K video, Intel also improved video playback 4K on devices with and without 4K screens. If the laptop is relatively new, playback will not be a problem, but will often sacrifice battery life.
With the 8th generation chip, you can watch 4K video on a 10-hour machine and up to 11 hours of 4K video stream on YouTube. Of course these numbers also depend on your computer, battery health, but this is the standard that Intel wants PC makers towards.
Intel's new chip is quite impressive but despite the quick demo of a laptop with a new processor with 4K video, there is no 5 year old 7-year laptop to compare.