https://buy.garmin.com/us-us/us/p/560327

It's interesting, it doesn't look like they added too much, unless you were looking for some very specific additions like bike shifting functionality, some possible bluetooth functionality, or mapping. I like that the HR is flush but it's hard to say if that will improve or reduce the reliability of reading of the users HR, it makes for a thinner profile but probably reduces contact with the user's wrist more often.
I can't even imagine how annoying the 5X would be on my wrist while running or biking, I haven't had a big "adventure" watch since my Suunto Advizor and the 5x is almost twice as heavy. It seems like the metal casing is costing them a lot of weight and probably not gaining much durability or water resistance. I'd love to get the mapping functionality just to have it to play with hiking etc., even though I'd imagine it's more hassle and gimmick than useful in most cases, but I'm really more intrigued by the smaller/lighter 5S. While Garmin's specs appear to indicate the Fenix 3HR and 5X are the same physical size, from the early looks it appears that the 3 HR is really the same as the 5, and the 5X is significantly larger and heavier than even the 3 HR.
I'm sure they will sell great, as Garmin has the best feature set and overall functionality, but I think Garmin is still going to be missing a huge market share not getting something out that's fully functional in an even smaller size and lighter weight. The screen resolution and colors are still way behind most other smartwatches (S3 is 360x360 and 16 million colors), but for an adventure watch that's not a huge deal. I do think the $700+ price point for anyone that wants wifi and a scratch resistant display is going to turn a lot of people off, but the Fenix 3 HR sells great and it's $550+ too so consumer will vote with their wallets.
Shocking that the resolution jump wasn't more significant. Perhaps it's merely a battery drain issue and, granted, I have not performed a comparison with like watches to see if the "tighter view" yields a more compromised (battery) performance.
Why does a watch designed for fitness need a high res screen? I've never understood comments like this as it's not like you are viewing photos, Facebook or Instagram on them..
The screen is more than adequate for it's designed purpose.. I've never had a single complaint about the screen on the fenix 3 or fenix 3 HR. They are stellar for outdoor, data readability. My one and only complaint would be that Garmin needs to allow font size adjustment..
My .02
Sorry, I'm not buying the washed out argument...
All very readable with no issues whatsoever..
I do agree that I wish Garmin would allow font resize as larger would be better for some things like reading SMS notifications ect BUT the slight increase in screen resolution is going to do absolutely nothing to help with this..
Pictures attached I hope - taken through my microscope with an iPhone so not perfect -
Pictures attached I hope - taken through my microscope with an iPhone so not perfect - but with 15x magnification.