When this news first broke, I thought it's another "Trump-ism". He failed to get travel ban accepted so decided to introduce a gadget ban. Also US airlines have long been complaining about how companies such as Emirates and Qatar have taken their market share, albeit with cheaper fares (possibly through government subsidies) and a far better product. When the UK followed, but with variations to the countries, I thought this must be based on credible intelligence.
Emirates seems to be the first to publicise how they will deal with the ban by advising passengers that their laptop/gadget will be taken from them at the boarding gate, tagged then stowed in a locked security container with others and a receipt given to passengers for retrieval on arrival in the US. There's also the issue around the stability of lithium batteries. No doubt there's an entrepreneur somewhere who is hastily marketing a fireproof container to house the battery and intending to charge a premium price. 
Doesn't apply to flights to US originating in UK, at the moment......
