Perhaps, though i'm still sort of confused about why this is a 'technical hurdle.' As i said, it's not a quantum supercomputer, just a quantum computer; quantum tech seemed desireable because it could be made small and robust (or i'd thought; i still want to know how femto/pico/nanomachines manage computing tasks without small quantum computers), and not because it can be scaled to rediculous power levels if given a larger area to work with.
If i were to switch it to a more biological model, using Lorath tech, i'd probably also replace the capacitor cell with a bacterial battery- but that raises the quesion of charging. I used scalar fields because it was a way to combine both power distribution and high-speed communication with femtomachines in one simple package. Altering the substrate to handle chemical power distribution would be a simple task, but scalar fields allow the node to charge the sustrate from a distance.
Also, though the end result may be something resembling a hand tool, the end result may also be something resembling a hamster; Utility Goo has biological components for a reason. The second application i'm working on (the original application, actually; the glove was just quick to write up) is to use a maximized network of nodes and substrate as a physical surrogate telepresence drone.
This would work by connecting the user to a SPINE interface or something similar, then bouncing the signal over an FTL subspace relay to a drone in a remote location (presumably, where NODAL is undesirable or unavailable). The drone would be able to mimic the external physical attributes of the user (apperance, scent, etc.), allowing meetings with a physical component without requiring transport or the custom cloning of a sprite avatar.