I think computers are not really essential for modern education. What is important, is that we know our basics. If we have a strong foundation, we could be better off in the future. Even though jobs today are largely dependent on technology, we can learn how to use computers later on in life or alongside any other work.
There are various subjects that can be taught using technology such as computer graphics, programming like C++ and Visual Basic, history (by showing videos), etc. For drama, computers can be used as well to show videos of famous actors in the past. Subjects such as chemistry, biology, art and music are better taught without a computer because these are practical subjects.
In conclusion, computers could be used in education but it should be kept to a minimum. If a child gets addicted to computers from a young age, their basics in subjects like maths, for example might not be strong due to the use of calculators.