These is why Nokia Win7 is not going to get my money!

[edit] Features removed from Windows Mobile

Windows Phone 7 lacks some features that were found in earlier versions of Windows Mobile. Among the features that have been confirmed to arrive in the near-future include cut, copy, and paste,[65] full multitasking for 3rd party apps,[66] and Adobe Flash.[67] Windows Phone 7 supports upgradable storage via an SD Card; however SD card memory is merged with the phone's internal storage, and changing the SD card causes the phone to reset to factory settings.[68][69] Windows Phone 7 does not support connecting to Wi-Fi (wireless) access points which are hidden[70] or have a static IP address,[71] tethering to a computer[72] (although it can be done via a hack on the Samsung Focus[73]), videocalling,[74] VoIP calling,[75] USB mass-storage,[76] universal email inbox,[76] universal search,[76] a system-wide file manager,[74] Bluetooth file transfers,[74] USSD messages,[77] or custom ringtones.[78]

Windows Phone 7 devices only support syncing with Exchange ActiveSync[79] over the network. There is no support for syncing with Exchange ActiveSync using a cable or cradle.

In the enterprise, Windows Phone 7 does not support Office documents with security permissions,[80] IPsec security,[81] on-device encryption,[82] strong passwords,[71] or internet sockets.[75] While the older Windows Mobile phones supported the full range of Microsoft Exchange Server policies, Windows Phone 7 only supports a small subset of Exchange features.[83] The Calendar app no longer has a 'Weekly' view.[71] The list of past phone calls is now a single list, and cannot be separated into inbound, outbound or missed calls.[71]