Pull trigger on Samsung Chromebook or wait?

I'm considering buying the current model of Samsung's Chromebook (this guy: http://www.amazon.com/Samsung-XE303C12-A01US-Chromebook-Wi-Fi-11-6-Inch/dp/B009LL9VDG/ref=sr_1_1?ie=UTF8&qid=1366647211&sr=8-1&keywords=samsung+chromebook)

However that was released in October and it's almost May now - I don't want to buy this model then have them release a new one a week or two later. For example, Google I/O is just around the corner; maybe they'll announce a new one then?

So, thoughts? Should I buy now or wait?