It makes sense, but seeing that they are reasonably fast-ripening fruit, I personally find that tomatoes sun-ripen better, especially if you put ripe bananas next to them. While avos and mangoes, for example, that take very long to ripen and stand at risk of not ripening at all, ripen better when in a bag or when exposed to other ripe fruit.

If the tomatoes were still a solid green, id put them in a bag for a bit, with another fruit that is in the prime of its Etheline secretion. But if they have any coloration on them already, even in the slightest, I'd let nature take its course.

But I mean, if you are talking about frost on its way, the cold might retard the ripening process as well, so maybe the bags are a better option for you.