I totally fail to understand your meaning.
Well, I'm basing these questions on the following comment.
I very much look forward to this only having mobile apps which are poorly updated or non-existent for all the platforms except Android. Like they do with pretty much every other app for their services. Quite frankly I have no idea how Google have thus far avoided an anti-trust investigation on this issue and I hugely look forward to the day when they get one.
I assume you are implying that Google should be investigated for anti-trust behavior because they update apps infrequently for other platforms or don't provide them at all. You seem to base your reasoning on these applications having a monopoly in their market (I disagree, but I don't really care on this point) and Google using them to somehow creating a competitive advantage in other markets.
However, this behavior is identical to most, if not all, competitors in the mobile OS market. For example, Microsoft has Skype and keeps it updated most often on its own OSs. Every competitor has at least one product in a market that they have a large majority or virtual monopoly over and uses it to further their mobile OS.
So if everyone is doing this, should they all be investigated for these practices? Is condemning them for this going to be some sort of slippery slope? The problem is that the idea of forcing them to support platforms seems somehow wrong. You are forcing them to add extra costs for what might not be, disregarding anti-trust behavior, good allocation of resources.