Google has just announced a partnership with VMware for "cloud access" to virtualized Windows desktops through Chrome OS. The Verge takes the narrative that Google is looking to hurt Microsoft via their enterprise market. Honestly, I think it just makes sense as a business.
As time passes, the list of tasks which require native applications is diminishing. Legacy applications, which cannot be reprogrammed for copyright or development reasons, are still on a leash to their intended platform, however. Google knows that their customers want access to those programs and utilities. Virtualization is one of the easiest ways, especially since it is already happening.
Some will prefer native apps on a dedicated machine (and that is okay).
Google also notes that Windows XP is nearing its end of life. They claim that Chromebooks and virtualized Windows instances nullifies security vulnerabilities and compatibility woes. Of course, you are never perfectly secure but at least Google puts their money where their mouth is.
VMware Horizon View 5.3 is currently available "as an on-premise service".