Not necessarily. YouTube is a separate social network, and while they might phase it out in favor of Google+ videos eventually, there's no rush. They can experiment more with an independent YouTube, in ways they never could with Google Video. They seem to have a good team working on it, who shouldn't be wasting their time dealing with the G+ people yet.

Same deal with Android. Some day it'll merge with Chrome, but right now, it's better to keep them apart and follow each vision through, to see where it leads.

The hospitality company I work for does this with properties. We have an inland 5-star inn & health spa with world-class fine dining, contemporary oceanfront hotel & fitness spa with seafood restaurant, riverside motor lodge & yacht marina, beachfront bed & breakfast, Italian restaurant, event center, skiing/hiking resort with gardens & fine dining, seasonal hotel that we only manage, and upstart chain of luxury hotels. This diversity allows us to experiment, and eventually scale up more broadly and efficiently.