Does it still rely on identifiers handed out by your telco to identify who you are? Which are not easily movable between devices without moving a little plastic trinket that the telco sells you to access their data network? Can you still not recieve them on multiple devices?
If it still has all the limitations of SMS, then not interested. At least imessage can be used on any device you log in with, and the identifier is your icloud not a "phone number" assigned to you by the place you buy data from.