21:9 and 16:9 thoughts
Go with what has the best quality in your price range, if quality is equal between everything and you have the hardware to drive it my preference is:
40" 4K 16:9 > 34" 1440p 21:9 > 27" 1080p 16:9
Reasoning (pros/cons):
27" 1080p 16:9
- Fine for most media, movies have black bars above and below though.
- Games look good with a little AA.
- Easy to drive.
- Desktop space is limited.
- Your base line screen these days, does everything well but nothing outstanding.
34" 1440p 21:9
- Same height as 27" 16:9 but wider.
- Good for movies because the black bars are gone (after setting it up right) effectively giving you a much larger image than 27" 16:9.
- Movies wont be running at native resolution but that's not a big deal for movies (matters more for desktop/games).
- Games look a little sharper but not drastically so however the wider screen makes it more immersive.
- 2.38x more pixels than 1080p so more processing power required.
- A lot more desktop space than 1080p.
40" 4K 16:9
- Roughly the same width as 34" 21:9 but taller.
- Good for movies because 1080p and 720p scale natively (2x/3x) and the image will be roughly the same size as on a 34" 21:9 but with black bars above and below.
- Games look a little sharper than the 1440p and the large screen makes it even more immersive.
- 4x more pixels than 1080p requiring a lot more processing power (1080p scales nicely though so that's an option but 1440p doesn't).
- Tons of desktop space.
- The size makes it comfortable to use on the desktop without scaling.
The IRL downsides of 40" 4K are the image quality generally isn't as good as what you can get from the other two sizes in the market today (that'll change in time), 4K is basically limited to 60Hz for the moment and obviously price is a lot higher which leaves me thinking 1440p 21:9 is the sweet spot at the moment, you get some nice improvements in games, you can get some nice IPS and now/soon high refresh rate panels with G/free-sync and its a nice pixel density for desktop/productivity. Only thing I don't like about a lot of the 1440p 21:9 monitors ATM is the curve, its not bad but a flat screen is better IMO. The 4K option will be the top dog when the panels and I/O interfaces have had a bit more time to evolve IMO.
P.S. Its a 28" 21:9 monitor that is roughly the height of a 23" 16:9 not a 34" ![]()

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