The simple answer is that wireless is not as easy to stream as wired. It can be possible to have success with wireless depending on the exact requirements and circumstances, but it’s not sure-fire.
An alternative wired connection technology using coaxial cable (stuff you may already have in your walls for CATV/Cable modem) is MoCA. I have been using some Netgear MoCA bridges successfully in my apartment that was not wired with twisted pair. It can handle the full bit rate of Blu-ray without issue.
