Microsoft sure know how to drive away customers. They are certainly not endearing themselves to current Nokia owners who are likely to be the very people to buy a new product with the WP OS.
However I guess you do have to wonder why Microsoft ever bought the Nokia handset operation. Their master mind Stephen Elop trashed Nokia's market share and now it seems likely Microsoft will not even use the Nokia name for much longer. Perhaps it's no surprise after all that they have shown no loyalty to existing customers.