EFV- this is hardly the same thing. They are NOT restricting use of other search engines. Just providing their own service for who wants to use it. Why does it bother you?
Why doesn't google develop their own os and put their little search box up there? Of course, if they did, you would get a different desktop every time you opened it and your icons would play hide and seek with you and probably only half of your os would start up and the rest of it would either be deindexed or go supplemental.