Even though Apple is not expected to unveil the new iPhone for several months, the iPhone 13 has been the subject of countless rumors. But which upgrade is really worth spending hundreds of dollars on?

After all, Apple's new iOS 15 will work on devices dating back to the iPhone 6S. And for many people, their current iPhone is "good enough," so Apple will have to come up with something special to convince people to upgrade to the iPhone 13.

I've been researching the rumored iPhone 13 changes, and some are meh and others actually exciting. Here is a brief breakdown of the iPhone 13 upgrades that I think are really important.

I don't know about you, but when I try to take a picture of the moon with my current iPhone 11 Pro Max, it messes up any picture. And the iPhone 12 Pro Max is not much better.

Rumor has it that Apple is upping the computational photography game for the iPhone 13 in at least two ways. First, the iPhone 13 could offer astrophotography capabilities, allowing for more beautiful shots of the night sky. (Such a feature would put the iPhone on par with the Pixel 5, which just updated its astrophotography capabilities.) Furthermore, the iPhone 13 may be able to shoot video in portrait mode, which should allow users to enjoy the same bokeh effects as in their photos.

Yes, this upgrade is said to be limited to the iPhone 13 Pro and iPhone 13 Pro Max. But it could still make a big difference in the overall user experience. iPhone 13's 120Hz ProMotion display will allow for smoother scrolling and better game play on supported titles, as well as smoother video playback.

Apple is way behind in this game, but the good news is that it appears to be using the same LTPO technology found in the Galaxy S21 Ultra. This allows the display to dynamically scale down to 1 Hz to save power.

I'm going to take this rumor with a grain of salt, but according to one Chinese leaker Digital Chat Station, the iPhone 13 series will have a larger battery. This is because the iPhone 12's battery life, with the exception of the iPhone 12 Pro Max, has not fared that well in web surfing battery tests using 5G.

If the battery rumors are true, the iPhone 13 mini will have a 2,406 mAh battery, up from 2,227 mAh in the iPhone 12 mini. And both the iPhone 13 and iPhone 13 Pro would jump to 3,095 (up from 2,805). Finally, the iPhone 13 Pro Max would have a 4,352 mAh battery (up from 3,687 mAh).

Don't get me wrong, I like Face ID, but I would love to have the option to use Touch ID, and the iPhone 13 is rumored to offer a Touch ID fingerprint sensor embedded in the display.

While the world appears to be winning the battle against Covid, I envision scenarios where wearing a mask is encouraged or required, such as in public transportation. Also, being able to log in by simply touching the display would be a very convenient option.

As expected with any new iPhone announcement, we can expect a new processor, the rumored A15 Bionic, which should provide a speed boost. However, Apple already has the fastest phones, so we don't know how dramatic these performance gains will be. Also, the iPhone 13 series should have a new Qualcomm modem, so we can expect 5G speedups. iOS 15 update also includes 5G-specific tweaks to speed up iCloud backup, Apple TV Plus streams, and photo syncing.

Another pleasant upgrade is a smaller notch on the iPhone 13. iPhone 13 lineup will reportedly shrink, but not eliminate. Still, having more screen area is a good thing. We're also hearing that LiDAR will make its way into the regular iPhone 13 and iPhone 13 mini, so you should expect better autofocus and AR performance if you go the cheap route.

Of course, the iPhone 13 lineup should offer some new colors as well, as we've heard that matte black, orange, and pink options could be in the mix. And it's purely a way to let the world know you have a "new" iPhone.

But in terms of what is likely to have the most impact for the everyday user, the photography upgrade, the more enhanced battery, Touch ID, and the 120Hz display (for the Pro model) are worth the wait as iPhone 13 upgrades, And it's likely to be worth the money.