1. UI refinements
Ice Cream Sandwich was a pretty radical update for Android phones, bringing tons of new stuff and vastly improved visuals. That's why Google is expected to keep most of the UI in tact for Jelly Bean, limiting itself to only subtle refinements, like a new search bar on the home screen, for example.
2. Chrome as a default browser
Some sources as well as a leaked screenshot suggest that Chrome — currently found in the Google Play Store — will replace the stock Android browser. That may be a good or a bad thing, depending on your position regarding surfing the web on a mobile. On one hand, Chrome for Android is visibly faster, but on the other, it doesn't feature Flash Player support, which the stock browser has. However, this seems to fit with another change that's rumored to be coming with Jelly Bean...
3. No more Flash
You haven't forgotten that Adobe announced it'll no longer support Flash for Android after Ice Cream Sandwich, have you? Well, if this is the case with Jelly Bean, then it means Google really doesn't have a reason to keep the stock browser around, as it can just put Chrome. Still, some claim that the current Flash plug-in will continue to work with Jelly Bean, but this is all pretty vague right now, so it'll be wiser to just wait until tomorrow and see what happens.
4. Built-in file manager
Some rumors indicate that most of the changes that will come with Jelly Bean will be geared towards tablets, not phones. This actually shouldn't be such a surprise, considering that Google is also about to announce the first Nexus tablet at I/O, and Google usually launches new Android versions along with the Nexus devices. Here for hoping that Jelly Bean won't be exclusively available for tablets, but will come to update our phones as well.
6. Voice assistant
7. Updated virtual keyboard
It's not yet certain exactly how Google is going to improve its on-screen keyboard, but it's said that an easier way to switch between languages and integration with the new voice assistant will be part of the upgrade.
OK, fellas, now it's your turn - will these updates be enough for you, or there's something else that you'd like to see in Jelly Bean?
Stay tuned for our coverage of Google I/O tomorrow!