With all the excitement over the launch of the Nexus 7, and the unveiling of Android 4.1 Jellybean, Google has added a great new feature to the Google Play store that didn't get much fanfare. Now, you can log in to your Google Play account on the web, and apply updates to apps on your devices, as well as remove apps you no longer need.
To update your apps remotely, point your web browser to play.google.com. Log in to your Google account, and click on the My Android Apps tab. If you have multiple Android devices, choose the one you want to update. Then in the list of apps below, click on the Update button. Confirm your choice in the popup, and the app update will start. In our tests, updates were almost instantaneous.
In addition to updating, you can also remove apps from your devices. Find the app that you want to delete, and simply click the (tiny) Trash icon next to the app. Confirm that you want to delete it in the pop-up window, and your app vanishes from your device. Poof!
Unfortunately, there's no way to remove old devices from your account entirely, but you can hide unused phones or tablets in My Orders & Settings > Settings.