I have absolutely no doubt that there’s intelligence surrounding attempts to hide explosive devices inside electronics. There has been specific intelligence on this before. That’s why at times we’ve had to turn on electronic devices, and It’s certainly conceivable that the technical know how could have advanced to the point that a real working laptop could be used to hide nefarious objects.
Developing a threat in this way wouldn’t be easy, and aspiring to do this is very different than actually developing the capability, but it’s a claim we simply cannot disprove no matter how much the intelligence community has given reason not to trust its pronouncements.