Yup, air burst and lasers are the leading ideas atm. But you’re still dealing with a zone of protection a kilometer or so - not a big deal to defend the main command post or vital supply depots, but spreading that out to industrial areas, grid power stations and substations, seaport complexes, or cities and your ‘blanket’ of protection starts looking too small for the job of covering the ‘want to have’ as well as the ‘need to have’ protected.