The use of technology was inevitable, but like anything it evolves and improves over time and it is still relatively new to football.
It's great for matters of fact, but less beneficial for matters of opinion I think. If decisions are still being debated after the game has finished then I'm not sure if the technology has added value in that case?
It also brings into focus the current rules, such as offside - the current rule is simple enough, but given the accuracy of the data available, do any of us want to see a goal ruled off-side due to the length of a finger, or a kneecap. Thats not what the rule was intended to prevent, was it?