Today’s invention is a combined knitting and washing machine.
Clothing could all be made in a single sheet design. This would be designed to be completely unravellable, so that it could be pulled into a very small washing machine as a single, long fibre. This would allow washing to occur very efficiently -and also very quickly.
As the fibre emerged from the machine, it could be fed directly into a knitting machine (ie an automated loom). This would recreate some new, flat garment, whose pattern program could be selected from an online catalogue.
One’s entire wardrobe would thus fill only a few sacks of fibre and allow all wearable items to be made on the fly and to fit an individual perfectly. There might even be an intervening re-dyeing step, to change the colour of one’s outfit according to eg the season.