The passengers would now have to be a bit more patient and tolerant to cooperate with the security checkers and handing them over their phones, laptops and other electronic devices that they see with suspicion. The travelers should also be able to switch on their phone if asked by any security officer as uncharged devices may invite increased suspicion. Hence, it is wise to charge the batteries of your phone as adequately as possible and move ahead safely.
Richard Reid, in 2001, mischievously hid an explosive device in his shoes and tried to explode it in the American Airlines flight 67 to Miami from Paris. Umar Farouk Abdulmutallab in 2009 tried something similar in Northwest Airlines 253 to Detroit from Amsterdam. Both of these failed in their attempts.
The countries like UK, Germany and France will be following the suit at their international airports and some others including Africa, Middle East and Europe will have to join the group as per the TSA instructions.