Also, this lightning network is faster compared to Bitcoin, and also cheaper compared to fixed cost bitcoin.
Lightning network is faster because only the opening and closing transactions happen on-chain, every other transaction is off-chain and doesn't have to go through the normal BTC transaction confirmation process. Take note also that BTC transaction fee isn't fixed, it depends on the size of your tx and the BTC network congestion as of the time of broadcasting your tx.
Although the lightning network is currently still under development, it has the potential to change the way bitcoin is used.
LN cannot change the way BTC is used, it is a Layer 2 solution only, and surely most transactions will happen on the main blockchain.