A great example would be PDF generation for things like invoices. Rather than generating a pdf with something like PHP or Java. Render a regular html page with all the css you want (super easy compared to drawing a PDF using PHP) and then proceed to use a pdf printer on that page.

You could run such a thing as a microservice using a headless browser or PhantomJS. There are probably better ways to do this but that's one of the first things that popped into my head!