They actually didn’t leave much indication that they were there. No obvious suggestion that the laptop was even touched, BUT it happened at the bitcoin conference, was at the speaker’s hotel, and happened *during* the speaker’s dinner. It seems obvious that it was a targeted attack in at least some fashion.
Then you might want to have a lookyloo around or request a room change, if the hotel can be trusted(maybe new hotel). Or just throw every corner of the room a close up of your asshole. Fuck these people.