If you've been waiting for the AI Inbox in Gmail to become more widely available, today's the day. This was initially only usable by "trusted testers" in January, but has now started rolling out for anyone in the US. There is, however, a gigantic caveat.It's currently only available with the Google AI Ultra subscription, which is a whopping $249.99 per month. There's also the smaller caveat that this is labeled as beta, but then again Gmail itself was in beta for many years, so that's probably less relevant.As you can see from the screenshot above, the AI Inbox isn't really an...