What this home is missing however becomes pretty clear:
#1. A proper kitchen.
#2. A bathroom with a sink, toilet and shower.
#3. A large living space for entertaining guests.
#4. Additional bedrooms.
#5. The space is very narrow.
#6. Don't bother buying lots of stuff. There is very little storage space to be had. No library of books for example.
How could this be design be improved upon?
#1. Instead of 4 sections that slide, have 8 or 10. This would allow for additional rooms containing a kitchen, bathroom, library, etc.
#2. Make the width of the structure bigger. As demonstrated by the architect, a single person can move the individual sections by pulling with 1 hand. By making the sections wider this would add a lot more space in terms of width and it wouldn't feel so narrow and cramped.
#3. Additional structures could be made adjacent to this structure that houses the bathroom, kitchen, etc - but that would require leaving this building and going outside to a different building just to use the bathroom. Not very practical.
#4. Make the sliding section the upper floor of the structure, with the lower floor being stationary and containing all the plumbing - kitchen, bathroom, etc. They could even add extra bedrooms and a 2nd floor balcony if they wanted to.
Note - To make the first floor more interesting it could be built into the side of a hill to offer more insulation, for easier heating and cooling.
At present this cottage is a nice novelty, but it isn't practical to be living in long term. The design definitely needs improvements.