Laptops more susceptible to having keyboard recorded in quieter areas, like coffee shops, libraries, offices. Previous attempts at keylogging VoIP calls achieved 91.7 percent top-5 accuracy over Skype in 2017 and 74.3 percent accuracy in VoIP calls in 2018.
Yeah it’s more a proof of concept really. The fact it works at different distances shows it doesn’t have to be identical but there’s a lot of factors to take into consideration.
Creating a much larger training set with all sorts of variations would be the next step.