Gitter of it's own accord federating with matrix would be a watershed moment of a competitor laying down it's arms for the greater good, a détente in capitalism, and a really good sign for the future of all things Federated.
Element acquiring Gitter is normal M&A, normal business. It's still good for Matrix and good for Gitter users, and we're still cheering you on, but it's not quite that same watershed moment.