Scaleable exporting PDF
For many 'big print' applications, you need to upload your design in 100% off the format. But, in many cases, your design is made in 1:10 scale for better cross design, workflow and speed of Indesign.
It would be nice to 'export' your file in a scale. So that your Indesign doc remains the 1:10 scale (or else) and your PDF can easily be twice or ten times bigger. This is very handy for roll-up banner, screens, walls etc. You can say that Indesign should not be the right application for big print. But if i want that the brochure, wall and roll-up banners are exactly the 'same' in all its design, this should be very nice.
You can do that with this work around (and that's even better, because more flexible):
Place your PDF or InDesign like a graphics into a new document, page sized at the final needed output size.
Export as PDF. I do this for years on banner displays, when A4 prints are wanted.
Wolf Kamm commented
Definitely needed for ages.