I can somewhat see google trying to start a new altcoin however I don't think it would have that great of an incremental advantage over other altcoins just because it was created by google because google would need to stay somewhat uninvolved once it is launched in order for it to remain decentralized.

I think this will be a good opportunity for other tech companies to see how well bitcoin can increase their profitability and to get a real world "test" for bitcoin