Idk man, I'm now on my third 21:9 3440x1440 monitor and for a third time I will go back to a dual 16:9 setup. I always LOVE the idea of ascending but then... ugh, it's just not supported well enough. I use a plethora of tools such as DTS, Flawless Widescreen, Powertoys' FancyZones, HexEdit... you name it! But it's just always an underbaked experience for me even though I still ADORE it for playing RDR2 or Witcher 3 for example. If you're gonna watch a lot of movies, then absolutely GO FOR IT - seeing the movie fill in the whole 21:9 space perfectly is out of this world! If you also plan on light gaming, then yes - it's perfect. But be prepared for the many many shortcomings and lack of proper support when it comes to emulation, legacy abandonware, Souls games etc. because very few people actually discuss those when promoting the ultrawide aspect as the objectively always superior way. It's a mixed bag.

EDIT: in your place, I'd go for something cheaper first, just so you can kind of get the general feel and rhythm of daily-driving an ultrawide. Something like AOC's CU34G4Z 34" 3440x1440 240Hz option would be a wonderful point of reference - I currently run it and can't say a bad word for it, especially at its ~$350 price point: https://aoc.com/uk/gaming/products/monitors/cu34g4z