It’s not meaningless any more than talking about the differences and potentials for Google, Excite, Yahoo!, AskJeeves, and AltaVista were in 2000. At some point a meaningful differences appeared, and one was a runaway while the others crashed and burned.
Now this will likely be different because “search engines” were entirely consumer facing, while these iterations of AI will (purport) to serve different markets. Facebook’s, for instance, can be a Wholly-Owned-Subidiary® and be OK *(maybe). They will claim it optimizes targets for advertising and makes “summaries or comments” more useful, and so on. They can rationalize it to any degree they want, so long as it is entirely internal and their revenues keep rising.
Google might do the same, it’s an easy rationalization. Microsoft, a bit harder, but rising income masks a lot of sins. The others, groping for sustainable markets, may find some, but perhaps not to the degree that justifies the astonishing spend (or maybe it will, yes, this is an unknown). A couple are bound to shake out, and I suspect that a dip in the economy will cause at least a couple to fold.
I don’t think this is going to be a “winner take all” field, simply because AI may be useful for many things, both for general consumers, for companies’ pricing and logistics, for coding, for media, an d so on - and I suspect we will see them playing to whatever strengths they develop as time goes along. Right now it’s all hazy, for sure.
I am reminded of articles I read in 1998 wondering which on-line seller would do better: Amazon or eBay. For a while the money was on eBay, as it exploded and decimated newsprint classified ads overnight and was profitable almost immediately. Meanwhile Amazon was plodding along, selling books, and then a few other things and losing money hand over fist. In the case of these AI wannabes, there’s no telling which markets will open, which will seem good but falter, and which companies will follow which paths to glory. Or not.