My understanding is that Windows Mobile has been superseded by Windows Phone 7. Windows Mobile has been re-branded as Windows Phone Classic. This would mean that unless ArcPad and ArcGIS Mobile are re-written to use the new ArcGIS for WP7 sdk, they are now products destined to become irrelevant and limited to supporting WM legacy applications. Correct me if i'm wrong.
Whilst this is a challenge, it is a massive leap forward for mobile development.
What i've yet to see from MS is their plans for improving enterprise support for WP7 and also mobile device manufacturer uptake of wp7. Any insight into this area would be much appreciated