4G is the successor to 3G, promising to provide ultrafast broadband internet on the go. At present speeds of up to 40MB per second are possible, but eventually it will be as fast as 1GB per second! Even with speeds of up to 40MB per second though, you will wonder how you ever lived without it.
Video streaming, online gaming and even general web browsing are becoming infinitely better. With html5, websites are becoming increasingly sophisticated, eating up more and more bandwidth; 4G allows these pages to load in an instant.