Generally, most of that forest destruction is to grow soy beans for animal feed. Feeding the soy beans directly to humans is far more efficient, so, if more people adopt TVP instead of meat, you'd expect a drop in land requirements.
According to TFA, the Impossible Burger 2.0 has reached parity with meat-based burgers. It seems unlikely that they'll just stop innovating, so they might eventually produce a soy-based burger that tastes better than meat at the same price. If that happens, it's game over for meat.
It'll still be a burger - or ground burger product.
What if I want a well-marbled aged beef ribeye?
Or if I want to smoke a pork shoulder or brisket?
Those kinds of products are going to take some time before they become manufactured from plant-based sources (or before they are "grown" - indeed, the first versions of that nature are likely to be too lean, which will be a real problem, especially for taste and texture).
