When Sony debuted the Live on YouTube app last month, we wondered if compatibility would extend backwards to some other high-end Sony phones. The time is now, Sony smartphone owners... at least if you own one of three very specific models. Last year's flagship the Xperia Z1, its slightly smaller brother the Xperia Z1 Compact, and the high-powered Xperia ZL2 (which is only available in some Asian markets at the moment), all have access to the app as of now.
Admit it, Glass owners, half the reason you're going to Google I/O is that you want to chat with other Glass people about how cool Glass is (hashtag throughglass). Google has given you plenty to chat about: they've just thrown a dozen new apps into the Glassware gallery, all of them from notable sources. Probably the most interesting is Livestream, the official app for Livestream.com, which was previously available as a side-load install.
Update 3: Live on YouTube is back, more than two weeks after it debuted and almost immediately vanished. The description still says it's only for the Xperia Z2, but we have no way of confirming that, so your mileage may vary.
Update 2: ...aaaaaaand it's gone.
Update: Commenters who own the Xperia Z2 and Xperia Tablet Z2, as well as the previous-generation Z1, have said that their phones are listed as incompatible.