I'm not going to comment either way on honeybees pushing out other pollinators - that's for other scientists to test.
However, to me the answer is rather insignificant either way when so many people are just covering their gardens with astroturf or block paving. Surely every other property down my road having a fully paved or fake turfed front garden (and goodness knows what's left of the back garden) is a threat of a far greater magnitude to other pollinators than my couple of hives. I can count on one hand, with fingers to spare, how many grass lawns I can see from my office window