True - but that I would argue is a slightly different thing. Referring to a thing is not the same as addressing the thing. Would Siri have been as successful were it to be addressed as Apple?
Yeah, I guess it makes you sound like a tool, but I'm not sure what unique phrase would work better.
As a person who finds both "okay, Glass" and "okay, Google" to be somewhere on a spectrum from merely awkward to full-on creepy, I would just prefer people could set their own custom keywords.