Doubt it. If all you need is web and email, and light entertainment, tablets (from Apple, MS, or running Android) are already there and people have already replaced their laptops with that, or will.
I'm not sure how you get that Windows is complex though; Windows is trim enough to run my phone, and it just as easy as Apple is. Android was a hot mess when I last used it.
So I think merging Android and ChromeOS really will have no impact at all, except to make people forget that ChromeOS ever existed, which I suspect why Google is going that route. As someone else pointed out, MS is way ahead of everyone with the Windows everywhere track their own. Plenty of companies have underestimated MS in the past; they're actually at their best when they have fierce competition, and we're seeing that today. Look at their offerings objectively, and MS has a pretty impressive ecosystem to offer.