What browsers does Silverlight run in and what browsers and versions of browsers does Silverlight not run in?

What are the browser formats to be concerned with if you want your web site to be viewed universally?

I mean, if you can develop a cool silverlight app, I know that Silverlight does not run on Internet Explorer 64 bit. So I guess I would have to use HTML 5 for that.

What about the other browsers and platforms and what would be the replacement technologies?

This web page gives a good idea of what browsers / Operating Systems / and Browser versions are compatable
http://en.wikipedia.org/wiki/Microso...#Compatibility

Here is a graphic from that web page that shows what browsers use SilverLight:


The first thing I noticed about this chart was all the grey "N/A" areas. These are clearly areas that we do not have to worry about. We don't have to worry about these areas because they represent a browser and OS combination that does not exist. For example, there are no Internet Explorer version 6 running on windows 7.

If I was to circle the areas where I am concerned with for using Silverlight, it would look like this:



And if I was to circle the areas in red where I need to find some other way of representing dynamic information (like for flash) it woould look like this:



So this makes new questions.

#1. Does flash run on SeaMonkey, Safari, and Opera
#2. Does flash run on the Mac OS.

What is missing in this chart is all the Linux distributions. Does Flash run on all those or do I need to find an alternative?

Also, this chart does not even mention Internet Explorer 9 64-bit which is why I started this question in the first place. I understand that HTML5 is supposed to be the next big thing that runs on this browser. Will it run on other browsers?

I also wonder how big HTML 5 is going to be. I found a white paper about this on Syncfusion's web site.

Mary Jo Foley wrote a blog about it on October 29, 2010, 7:34am PDT
http://www.zdnet.com/blog/microsoft/...s-shifted/7834

I asked Bob Muglia, the Microsoft President in charge of the company’s server and tools business, that very question and got what I consider to be the clearest answer yet about how Microsoft is evolving its Silverlight strategy.

“Silverlight is our development platform for Windows Phone,” he said. Silverlight also has some “sweet spots” in media and line-of-business applications, he said.

But when it comes to touting Silverlight as Microsoft’s vehicle for delivering a cross-platform runtime, “our strategy has shifted,” Muglia told me.

Silverlight will continue to be a cross-platform solution, working on a variety of operating system/browser platforms, going forward, he said. “But HTML is the only true cross platform solution for everything, including (Apple’s) iOS platform,” Muglia said.

Muglia said there definitely will be another version of Silverlight, and that it will be “very much in line,” in terms of functionality and features, as Silverlight 4, which Microsoft delivered in April of this year.
Does anyone have any insight into this?