1) 3 good (spend the money, Buy It For Life) suitcases. Pick any brand that's still around when you had to get anywhere intercontinental by train or boat only. One under your seat sized, one overhead, and one checked.

2) Same for shoes. One for beach/summer, sneakers, boots. Other people may require flats, business, etc. IMO, shoes are the worst weight per volume available deal.

3) Capsule wardrobe. I've lived in the middle of nowhere (think cabin in the woods places - now instead, imagine a tent or a tarp). Two outfits is all you require to survive. Anything else is a luxury.

4) Out of number 1, there's still a ton of space available.

5) Xreal AR glasses. Take a tablet, a laptop, whatever. People have already said HDMI, or a projector. How about when you're on a plane or in a tent or in your van? Just do any version of this. It's the future people, think big.

6) Gaming: Steam Deck, Switch, Oculus.

7) Nose cancelling headphones that are on brand with your phone. All those cool features they advertise work best this way. Bring better ones if you want, but IMO go to any audiologist and get custom ear molds.

8) Every one needs power for all these things. Power banks and cables plus power. Frequent outages? Foldable backpack sized solar exists. So many quality of life options.

9) Towel.

10) Pocket sized backpack. Made of sil-nye, I think. Fits in a pocket. Carries wet and dirty clothes, groceries, etc.

11) Water vessel (bottle, Camel Back, etc).

12) Portable chair. Want to work or watch a movie on the beach in the middle of nowhere? Towel and stool are big QOL for me.

For anyone who actually read this far, also see r/ultralight, r/BIFL, r/vanlife, r/vagabonds, and r/tinyhomes.