Thinking about this a little more, it might be a genius idea for a winery to sell some smaller bottles. A virtual tasting would make a lot more sense if they sold a flight of single serve bottles like the mass producers do, then hosted the tasting on Zoom or whatever. Too late to do now, as anything drinkable is already bottled. But maybe this goes on for a while, quarantines for now, but even a year or two from now travel may still be down or virtual tastings just become a thing regardless.
If a winery I liked, or wanted to try, shipped me an 8 pack of small bottles for $25-$50, I'd consider doing this, and then buying bottles of any I enjoyed. This might even open some new markets after this is all over. Listen up Napa!