While on OS X you can replace everything easily to craft the experience you need, on iOS, it's not as much of an option, sadly.
Also, I don't really like Google's desktop offerings - or the lack of them - everything is a webapp, and they just don't work as well as proper desktop software would have. I am so annoyed by the random reloads Chrome apps do, and the utter disrespect they have for multiple desktops.