  The resolution of near-field beamforming is an important metric to measure
how effectively users with different locations can be located. This letter
identifies the condition under which the resolution of near-field beamforming
is not perfect. This imperfect resolution means that one user's near-field beam
can be still useful to other users, which motivates the application of
non-orthogonal multiple access (NOMA). Both the analytical and simulation
results are developed to demonstrate that those near-field beams preconfigured
for legacy users can indeed be used to effectively serve additional NOMA users,
which improves the overall connectivity and system throughput.
