You seriously believe Google will ditch it's iOS Maps App? God, i cant believe you guys. They will of course still make a Maps App for iOS, even when it is not the default one. Thus everyone will have Streetview and Free Turn by Turn navigation.
Are we sure Google would do this? Why would they want to give iOS users the best of both worlds? Wouldn't it be better for them not to make an iOS app and use that as a selling point for a "better" maps experience on Android devices? I hope this is the case though, or at least that we will be able to fully access Google Maps via Safari.