Thinking about what I would want that Google doesn't currently provide and that would be feasible with today's technology, as a practical matter my wish list ha

Thinking about what I would want that Google doesn't currently provide and that would be feasible with today's technology, as a practical matter my wish list has one item: when I search for a scientific paper, or terms for which such a paper is the best match, I'm looking for a downloadable PDF, or to be told if no such thing exists, not an abstract with the actual content hidden behind a paywall. A search engine that provided that, I would happily use.