Yup, that's exactly it. On-demand (not just immediately after release; sometimes you learn about already screened or even finished series and you want to start watching it), downloadable (optical media simply sucks, doubly so when they get scratched) and in original language instead of some crappy translation. There are ways in my country in which you can download like this in a technically legal way, with consistent download speed, simple interface and a better quality than streaming service - you only pay for gigabytes of transfer you use. There're tremendous amounts of money going to such services instead of publishers and authors because official sources can't be bothered to do media distribution in a viewer-friendly way.