Personally, I'm all for MS bundling Silverlight with Windows. The difference between this and the IE/Netscape debacle is that the internet browser decision is a choice made by the user, and by bundling IE with Windows, MS essentially made the choice for 90% of its non-tech-savvy users who didn't know they could download a different browser. (Not to mention, I seem to recall IE was actually a better browser than Netscape. despite its awfulness today).
By bundling Silverlight with Windows, they are contributing towards making the technology a standard, allowing developers to make the choice to write Silverlight apps rather than Flash apps without having to worry about how many of their users have it installed / will install it. There will never be more computers with Silverlight installed than Flash, unless Adobe makes some huge mistakes, but by trying to make the numbers more equal, MS is giving developers the power to write apps for the technology which best fits their needs. Whether or not Silverlight is that technology for a majority of developers remains to be seen.
By bundling Silverlight with Windows, they are contributing towards making the technology a standard, allowing developers to make the choice to write Silverlight apps rather than Flash apps without having to worry about how many of their users have it installed / will install it. There will never be more computers with Silverlight installed than Flash, unless Adobe makes some huge mistakes, but by trying to make the numbers more equal, MS is giving developers the power to write apps for the technology which best fits their needs. Whether or not Silverlight is that technology for a majority of developers remains to be seen.