1. More options and choices
3. Better battery life
4. Uses less data per minute when streaming videos and music
I'll give you the first 2 and they're cheaper because its old tech. As for using more battery, its mainly if you don't get good 4G signal. If you hate it that much, you can always disable 4G and run on 3G. As for it using more data, speed has nothing to do with being a data hog. It just means you have the possibility to use more data because you don't have to wait for it to buffer. Using more data is up to the individual.