Here's the new version of To-Do in action on my IDOL 4 Pro:
At the moment, there's only one choice for what's shown on the To-Do live tile - your tasks for 'My Day' - it doesn't currently also shown tasks which are also 'due' today - so there's some configurability definitely coming.
You can grab Microsoft To-Do here in the Store, if you haven't already. As mentioned before, this is shaping up to be an attractive and pretty powerful tool/service, syncing on multiple devices and platforms, and I'll be diving into more depth with it in due course.