You're saying Google is enforcing whatever it wishes upon others. Aka, non-standard stuff.
The Pepper API would be all nice if it wasn't hiding the NaCl vessel. NaCl is a very hard to standardize (yes, being open source has nothing to do with ease of implementation, or proper standards. News at 11.).
NaCl is also (one of) the vessel for Google to get more control over the web, due to the above, and that it can do stuff such as "take your C/C#/etc. app and run in it Chrome, via Chrome market!", while they know others can hardly ever implement it.
you can be relatively sure that Google pushed Adobe a little bit in that direction, and that eventually flash may be Pepper API only. Its easier for Adobe too.