  We present two different strategies for developing a quantum information
science platform, based on our experimental results with magnetic microtrap
arrays on a magnetic-film atom chip. The first strategy aims for mesoscopic
ensemble qubits in a lattice of ~5 {\mu}m period, so that qubits can be
individually addressed and interactions can be mediated by Rydberg excitations.
The second strategy aims for direct quantum simulators using sub-optical
lattices of ~100 nm period. These would allow the realization of condensed
matter inspired quantum many-body systems, such as Hubbard models in new
parameter regimes. The two approaches raise quite different issues, some of
which are identified and discussed.
