Silvelight API OR Flex API ?? Confused ?

With the announcement that Silverlight API is to be released soon with almost the same capabilities as Flex API, I Was at the beginning bit confused which path to take, for me, i guess that popularity matters, Flash has 90% of the market, well 90% becauase its been out since almost 10 years, will silverlight be popularand used by others, well i have to say, just like flash when it started, Im a .NET guy, so why to start over a new thing, i'll do silverlight to ArcGIS Server since its based on the .NET Framework. I Found an Article that is really good and makes good sense. here