People are taking you awfully literally here. I think the idea of only having to ever configure and trust 1 device is fantastic.
I guess people are thinking of the integration that is available today and how awkward it is, rather than the integration that can happen when everything ships with support for working with everything else.
Sure the software needed at the center of it doesn't exist, but there isn't any fundamental limitation on presenting device appropriate interfaces, it's just integration work.
I really don't believe a company like Apple would be more than five years away from being able to do something like this, either... Provided they wanted to, of course.
It still may be too soon, and I'm certainly not thinking the device in the linked article is the solution, but there are a lot of possibilities here.
I guess people are thinking of the integration that is available today and how awkward it is, rather than the integration that can happen when everything ships with support for working with everything else.
Sure the software needed at the center of it doesn't exist, but there isn't any fundamental limitation on presenting device appropriate interfaces, it's just integration work.