Considering that I can't even get the Word grammar checker to accept the kind of convoluted sentences I often write, I'm not going to expect much from such a product at this time.

I imagine something like that could, possibly, be made to work with technical writings. Those are usually written to stand pretty much on their own. Anything beyond that, and it takes far too much context and understanding of human foible to get anything from any human communication, whether it be written or spoken.

I can see a computer being able to "compute an answer" to questions like, "what's the freezing point of water, in Kelvin, at sea level?" I can't see one being able to compute "what's the best opening move in chess?", much less "is the US economy up or down?"