Maybe this is a possible evolution? Third party ink producers create photoshop add-ins allowing you to specify their specific products - not just standardized colors but actual bottles? I mean you'd loose the benefit of Pantone standardization. But anyway I use the colors brands that my trusted printshop uses. If they tell me ACME ink 1234 is the same as Pantone ABCD then I just would replace that in the document and be done.
(Well to be honest for 99% of things I did spot colors (I think that's the term) are overkill anyway and my printshop guy just told me to use CYMK...)