Samsung galaxy S8 Show off

You know what's coming tomorrow, you've known and waited for it for months now. Samsung's 2017 flagship smartphone, the Galaxy S8, will be officially announced, and one of the most critical periods in the company's history will begin. The phone Samsung launches on Wednesday will carry greater expectations and have to prove a lot more than usual. Even as the world's biggest smartphone maker, Samsung's mobile credibility was deeply shaken by the Galaxy Note 7 snafu, so it now needs to reassert its reliability while also rebooting its technological advantage. Here's a rundown of the biggest challenges facing Samsung as it prepares to take the wraps off the Galaxy S8.

The battery

Of course. The bad jokes about "explosive Samsung news" haven't subsided even now, half a year after the Note 7 was recalled. The first thing everyone wants to see from Samsung is a phone they can trust won't spontaneously combust in their pocket or hands. That may seem like a low threshold for Samsung to pass, but the company will have to do it with zero tolerance for failure. Practically every smartphone in history has had examples of overheating batteries, but most are treated as isolated events and freak accidents — except in Samsung's case, even one malfunctioning Galaxy S8 battery would result in a deluge of negative press. The optimistic way to look at things? If Samsung does the right thing, the new Galaxy S8 devices will have the most robust and durable batteries we've ever seen in a smartphone.

There is, however, another aspect of the battery that will be a cause of intrigue with the S8. Per the latest leak over at WinFuture, the smaller S8 is set to have a 5.8-inch display paired with a 3,000mAh battery. That's 0.7 inches more screen than the 2016 Galaxy S7 model, but the same battery capacity. Samsung got itself in trouble by trying to force the biggest possible battery inside the Note 7, but will it fall behind in the endurance stakes with the more conservative combination it has in its latest phones?

Image: Evan Blass / Twitter
The home button's demise and the screen's elongation

Every leaked image of the Galaxy S8 shows it dumping Samsung's signature home button in favor of an entirely software-based interface and the smallest screen bezels in Samsung's history. What's lost with that physical home button is not only a familiar and tactile method for returning to the starting screen; it also housed Samsung's fingerprint sensor, which is being relegated to an off-center position on the rear of the phone. Will we all successfully adapt to that change? Probably. But it's another question mark around Samsung's new release — using this phone will not be an instantly comfortable experience for longtime Galaxy users.

The other aspect of Samsung's big change up front is the extension of the display itself. It's shaping up to have teeny tiny bezels at top and bottom and an aspect ratio of 18.5:9. Even more elongated than the LG G6's simpler 2:1, this display will have to show itself at least as useful as the more traditional 16:9 ones. We don't yet have a good idea of how the Android interface will scale to such a peculiar shape, and we don't know how well Samsung has optimized its software to make use of the extra space. Will the new display be beautiful and futuristic to behold? Absolutely. But will it work well in daily practice? That will be one of the things Samsung's Galaxy S8 will have to prove.

Image: Evan Blass / Twitter
The camera

If you want to know the catalyst of Samsung's ascent to being considered on the same plane as Apple's iPhone, it was a combination of improved design and having the best camera. Over the course of multiple generations, Samsung separated itself from the rest of the Android competitive field, outdoing rivals like HTC, LG, and Sony with the best optics and image processing available outside the iOS stable. Both the Galaxy S6 and S7 could make legitimate claims to being even better than the corresponding iPhone​