This is a signal that the AI assistant race is expanding well beyond the devices Amazon builds itself. Amazon Amazon has officially expanded its AI assistant, Alexa+, beyond the company’s own hardware. Along with the announcement of its Lifestyle Ultra speakers , Bost has also announced that Alexa+ is coming to its lineup of speakers and soundbars across the United States. This is a first for any non-Amazon audio brand. What’s even more interesting for me is that the rollout covers both new and existing Bose devices.  Amazon What can Alexa+ actually do on a Bose speaker? Quite a lot, actually. It can do everything it has been doing on Amazon’s first-party lineup of smart speakers.…