Both WPF and Flash support path animations; it'd be nice to see these in Silverlight as well.

PathListBox could be abused to do this but it doesn't seem like the right way to support it.

It is an excellent general purpose data bearer for dynamic metadata driven apps, where no Business Object types are known at compile time.

Users should be able to highlight any text in a Silverlight application, copy and paste it, or do whatever is appropriate in a given context. For example, TextBlock doesn't allow text selection. Currently, I can add TextBox objects and set their isReadOnly to true, but this is just a workaround. Silverlight should support text selection by default like HTML does.

Building business apps in Silverlight, it's very usefull to be able to make shortcuts for the users.

frequent users will like to click F4 rather then navigating with the mouse for a function.

Please enable full keyboard grabbing - or at least the same level as Javascript !

Javascript is able to cancel/grab the following:
- F2 to F12 (F1 is impossible in IE7)
- CTRL + any key combination
- Shift + any key combination
- almost all keys except maybe CapsLock

Especially the ability to retrieve not only virtual key number, but mapped character.

Atleast click event must be incorporated with the notfification window....atleast for that I could maxamize my app again on the user's screen by click event on the notification.. :)

For one-shot LOB applications or simple browsing and email.

Effectively push out Google OS. Nobody want code in C++ under linux. Or NaCl proprietary nonsense.

Have platform that runs in Windows7, browser, Macintosh, netbooks, MsPad :-) will be legendary!

Ports such as 5222 (XMPP, Jabber) and 587 (SMTP) should be unrestricted to allow broader communication.

Access to Windows Certificate Store for Signing PDF or XML from InBrowser mode. Support for Smardcards and USB Tokens.

Now we must do it throught JDK6 applet :-( .

Pretty interesting feature to e-business and government/public area.

Silverlight should allow to integrate directly with project Natal and all its features so it can be used as an alternative user interface.
It will allow in short a new generation of user interfaces, applications and games and, when it gets more powerful, advanced interfaces for Business Applications.

In an OOB app, the end user must shutdown and relaunch the application to start using the updated copy. If the user has already indicated that they TRUST the application we should be able to call a method like App.Restart(). Given that SLLauncher is really just running IE behind the scenes, this code should not take long to implement, as in both in-browser and OOB experiences, it is really just "refreshing" the webpage.

Now support of shaders in SL is not complete. If you provide full support for shaders it will allow developers to create 3D engines are even better than Balder.

We have to get some killer features for Silverlight. Games would arise even more when we have our full fledged managed 3D API with shaders using OpenGL/DirectX depending on the system.

This is the time new control mechanics should be implemented. If we have them, Flash, Shockwave and Java get completely kicked out of their socks for game development!

A full GPU accelerated 3D engine should be included, something like a fast wrapper for Direct3D or OpenGL (Mac).
Just imagine how a state of the art 3D game would push Silverligt in the market. IMHO it has the potential to overtake Flash's current dominant market position.

Implement full supporting virtual mode:
populate a DataGrid in virtual mode asynchronously, INotifyCollection,
ScrollViewer.IsDeferredScrollingEnabled

In Silverlight, developpers cannot create their own RoutedEvents, dispatched, when raised, throughout the whole UI tree. This is a "must have" feature for custom component development, and, without it, it is very complicated to make components compatible with both WPFand Silverlight. There're some open source implementation, but still buggy. As the mechanisms is already implemented within Silverlight (mouse events ARE routed events), could you open the API and let anyone define its own events ?

There is no support for XML Schema validation in Silverlight 4. This is needed when you download XML-files from websites and needs to validate them.