Just about 15 years ago, Google introduced ChromeOS and Chromebooks , right when cloud computing was becoming mainstream. While early Chromebooks were fraught with limitations, ChromeOS's constraints dissipated over the years, becoming a low-cost, viable alternative to what Apple and Microsoft offer. Google's now looking to shake up the laptop market once again with Googlebooks  -- but this time, it's all about AI.  What's a Googlebook? The simple answer: It's a premium laptop powered by an Android- and Gemini-based operating system, with the desktop feel and built-in security of ChromeOS. But trying to explain what that actually means to someone who's not too tech savvy is a little trickier. The basic idea is that using a Googlebook shouldn't be all too different from using a Chromebook or any other laptop, you'll just get more Gemini AI-powered tools built in, along with access to the full universe of Android apps.  Watch this: Googlebooks: The Ultimate Laptop for Android Users?…