I don't know for certain, but Intuit will not be dropping Desktop in a hurry. There are a lot of Desktop customers in the UK, some of whom run multiple companies on it. For Intuit not to implement MTD would generate a hell of a lot of angry customers, who between them probably make Desktop a viable product.
MTD does not come in until next April. So I would expect to see beta versions of QBD arriving for testers later this year.