Lighting network uses 'state channels'. Its basically a network for people to make secure transactions without having to upload every single transaction on to the blockchain. It won't become successful overnight as it is a protocol which means its success relies on adoption but we are already at 2000 nodes and only a month into the main net being launched!

If successful fees will be as little as 1 satoshi making the IOT possible. it could change our relationship with money. Streaming money would then be a possibility! this is hundreds of sub 1cent payments a second. You could get paid by your boss per minuet live into your bank account