I don't think that is actually a good thing. I much rather have people less tied to one particular ecosystem, and preventing barriers to moving from one OS to another.
Instead they get to learn new ways of doing things with every single application they use regardless of platform and still have to deal with platform issues. Yay for progress?
However, they also benefit from innovation in how those widgets work, rather than being locked to historic buttons because the committee can agree on on pixel change a year
Innovation like not having a tabstop.
By moving from one OS to the other you really mean Windows/OSX/Linux, right? Because thanks to modern web(browsers) you can almost but forget using another one, regardless of someones checkbox design.