Nokia has released a small update (v34) for Nokia E55 to fix some minor bugs occurring in your phone. As it is a small update it is not worth to expect major app updates or new apps installed after the process is completed or any drastic changes with the User Interface. But being up to date is important and will certainly help you in good maintenance of your phone.
This update is only 620kb of size and you can download it via Nokia Software Updater on your PC or over-the-air (OTA) which would take less than a minute to download. Before updating always backup your data to prevent any loss.