Using a biomolecule as kind a nano-machine might sound impractical idea, because biomolecule is usually unstable, irreproducible, etc. Realizing practical artificial nano-machine (nano-flow-sensor in this case) is a different issue and is technological improvements on the immediate horizon.
I can't see the point of these unusably fast and entirely impractical machines, which are ridiculously over-specified for a quick spin along Britain's backroads.
In science fiction, Transformers are always giant structures, usually cool cars, big trucks, and generally the kind of shiny, manly, impractical machines that appeal to kids of all ages.
At the other end of the computational spectrum, massively parallel machines are also impractical because the solutions that can be implemented are very tightly engineered to match exacting specifications; hence a massively parallel solution is specialized and limited in the extent to which it can propagate [ 6, 10].
In resource-poor countries, where money is scarce and electric power uncertain, using and maintaining these machines is at best impractical and at worst impossible.
These aren't impractical performance machines or big-dollar luxury cars; they're the sunny but humble conveyances you see trolling South Beach with discreet Enterprise stickers on their rear bumpers, cars aimed at people who want a spacious droptop for short money.
As printing was done by hand, printers were able to achieve effects impractical with machines, such as the blending or gradation of colours on the printing block.
A ludicrously impractical or elaborate machine came to be called "a Heath Robinson contraption".
Tech news site the Verge liked the "beautiful" machine but found it slower, impractical and expensive, so the reviewer went back to his older Mac, while industry site The Loop described the company's Apple Music service as a consumer "nightmare" because of technical and design problems.
