"With the introduction of the new Office 365 Plans just a week away, I would like to know what changes, if any, I can expect to see in my current Office 365 P1 plan portal on 2/27. "
None.
MSFT decided to call their new subscription model Office release "Office 365" too - but it's completely unrelated to your current O365 account. Apparently that hasn't been made clear and many people are confused. We have no idea when O365 accounts will be updated but it won't be on 2/27.
