I have been trying to get rid of 'physical stuff' also. I still buy about 10% of my technical books in paper form (usually an eBook pBook combo), but I really prefer having everything in eBook form. Many eBooks are provided in PDF, iPad, and Kindle formats. I make permanent backups of the PDF versions in case the publisher can not provide fresh copies in the future.
For fun reading the local library is a good source of pBooks (and movies on DVD, audio books, etc.)
My wife and I have been talking about living for months at a time in different areas of the world, for fun and eduction. That will require at least being able to live for several months at a time without a lot of stuff.