Better integration of IP Phone with Desktop and Mobile Experience
1) Ability to Transfer from IP Phone to Soft phone and back. (I think now you have to park the call and then pick it up)
2) Ability to dial call from Outlook, but from the IP phone rather than only the soft client. in other words, if I am on my computer and select a contact in Outlook to call, it calls using the Team app on my desktop rather than the ability to use my IP phone. Shoretel has had this functionality for at least 13 years.