I emailed Graco about when we'll have more info on this seat. Here was their response.
We also have information on the Size4Me 70 (formerly the MySize65) that you were asking about. This seat is not out on the market yet, so I can’t actually share any details about the seat features, other than what is already been written. It is launching at Buy Buy Baby in late May, so more information will be available in early May. I hope this helps your question and if you have any more feel free to reach out.