What will happen to Windows Mobile?

Expanded from my tweet earlier today:

• HTC sells 80% of Windows Mobile phones.
• HTC rumored to be expect Android on 50% of its handsets in 2010

If this rumor is true, it doesn’t look good for Microsoft. For some further reading on why Microsoft’s mobile strategy may be in trouble, read Tomi Ahonen’s (lengthy) Open Letter to Microsoft about its “delusional complacency.”