50 years from now

I've been thinking a lot lately about my great-grandma and how lucky I was to get to know her. She has been in heaven for probably 20 years, but this week I have been thinking about her. I can remember walking with her outside of her small 1 bedroom house. The house had a tiny kitchen/dining room with no dishwasher (and I remember not wanting to eat off her dishes because she washed them by hand). You went up 3 stairs to her living area where she had old wooden gnome faces hanging on the wall and a crystal candy dish with circus peanuts in it (sometimes they were stale, which made them even better). She had a small laundry and bathroom with her tub and washer and dryer and in the other room was her bed. The outside of the house had wide, blue, wood siding and a white trim. If we walked to the side of her house, there was a honey suckle bush and there were some stairs that went down to her cellar. We always were afraid to go in there because there were spiders and who knew what else, but if grandma was with us, we were safe. She also had a beautiful rose garden and tall pine trees surrounded her house.
Detached from her house was her 1-car garage...and this is why I've been thinking about her. I remember her using all of her strength to pull open her garage door and closing it after her car was out. This past week my garage door reverted back in time and I have had to manually open and close my own garage door. My arm hurts and Jenna thinks I'm amazing all because of this garage door.
So, this is my question, how was it that she was content in a house smaller than the length of my bedroom & sitting room? Why am I concerned with having more room, more stuff, just more. I don't have to keep up with the "Jonses", but I do like to have a full closet of clothes (my closet is probably just a tad smaller than her bedroom). I have a whole room dedicated to my hobby, while she crocheted, knitted, and quilted all from her rocking chair.
My goal now is to remind myself that I don't NEED what I think I need - I am truly lucky that I have so much. In 50 years, will it matter? Will I even remember that I had that pair of shoes or the name brand clothes? I truly believe a simpler life is a much happier life - if only it were so easy to become that simpler person.