The term you coined as "liquid UX" is as far as I understand is a combination of "tangible user interfaces" and "calm technology" which have been discussed in the 90s. I'm sure you don't want to repeat existing concepts with a new buzzword, but I feel compelled to share this information because if we want to contribute to knowledge in any field, we shouldn't ignore the existing similar ideas. Otherwise, we can't build any knowledge, only chase our tails by changing the name of the concept in every decade.

Ishii, H., & Ullmer, B. (1997). Tangible bits: towards seamless interfaces between people, bits and atoms. In Proceedings of the ACM SIGCHI Conference on Human factors in computing systems (pp. 234-241).

Weiser, M., & Brown, J. S. (1996). Designing calm technology. PowerGrid Journal, 1(1), 75-85.