Let me clarify. If you want a jupyter notebook with an arbitrary number of cores gpus etc juliabox might be your go to solution. Probably you are also willing to pay in that scenario.
If you are in academia and simply want students to have an easy way to open a notebook and do some coding in a browser where relevant packages are already preinstalled then what i proposed is a sensible option.
Sure you can install jupyter in a laptop but you cannot do it in an ipad for example. Therefore using a url with an opened port in an ipad is an easy way to use julia remotely.