Whether it's online or at the airport, everybody has to check in before a flight ExXB...
Easyjet are quoted in the report as saying that this will be a cost neutral move. I interpret this to mean that they have priced the product at a level which reaps the same revenue which they will lose by not having speedy boarding anymore (though I stand to be corrected).*
From what I can gather, the speedy boarding option has been removed from those flights which have assigned seating and passengers are boarded according to seat number.*
*