Gaming Impressions, Pricing, Conclusions
So let's talk about gaming on the ASUS PB328Q. It is 100% feasible to see this monitor as a low cost alternative to other 30+ inch monitors on the market for a PC gamer. The resolution of 2560×1440 means that it will require less processing power than a 28-32-in 4K monitor so hardware and GPU requirements for that user should be substantially less. If you can invest less of your cash in your GPU, you could jump up to a larger format monitor like this one. At 2560×1440 a GeForce GTX 970 or Radeon R9 390 should be more than capable of playing most games at reasonably high image quality settings. If you were to spring up to that 3440×1440 UltraWide or the 4K monitors of similar size, you'll definitely need to upgrade to a GTX 980 Ti / Fury X infrastructure.
The 75Hz refresh rate gives you some added smoothness (both at the desktop and in gaming) and is a nice jump over standard 60Hz displays, to be sure.
Despite the larger pixel pitch of a 32-in 2560×1440 monitor compared to the more popular 27-in size for that resolution, gaming on the ASUS PB328Q didn't look different than I expected. The PB328Q has a PPI of 91 while any 27-in 2560×1440 display has a PPI of 108, the difference is hard to see with a game in motion. In fact, from my personal view, I prefer the larger screen WQHD implementation than the smaller.
All of that being said, the somewhat poor overdrive configuration on this display leaves something to be desired in terms of ghosting. Depending on the game being played, the environment and color schemes on the screen at any given time, the pixel persistence even at a TraceFree setting of 100 (the maximum) was often distracting. For example, I was able to play through some Battlefield 4 without feeling like the screen ghosting was noticeable. But in a game like Skyrim, where I was very often changing the view between the lightbox of the sky and mountainscape/cities, the ghosting appeared to be a bigger concern.
I think for the vast majority of PC gamers, the size of the screen, the relatively high resolution and low cost might overshadow the overdrive deficiencies. But for more discerning gamers, you'll likely want to compare other options.
Pricing and Availability
If there is another big strength to the ASUS PB328Q, it's the price. A 32-in monitor with a 2560×1440 resolution and solid build quality in this case commands a very modest price tag.
Getting a 32-in monitor for just over $500 is compelling deal, all things considered. This isn't a TN panel so you are going to get better blacks (even than IPS) as well as solid color reproduction and viewing angles. There are similar options from Acer and Samsung on the market, all within $10-20 of each other as I write this, likely using the exact same panel.
For productivity and content creation users, the ASUS PB328Q makes a lot of sense. It's low cost, it has solid color reproduction both before and after custom calibration and it's viewing angles and high contrast blacks make it perfect for that environment. Is it going to be up to the level of some of the significantly higher priced professional displays, even from ASUS? Likely not, but for a third or less of the cost, I think the trade-offs are totally valid. For gamers though, it's a different story. With so many excellent gaming displays on the market, some offering variable refresh rates, at the same or just slightly higher prices, I can't get behind the recommendation. If you really love the idea of having a 32-in screen with a resolution your GPU can handle, then maybe you are willing to sacrifice overdrive performance and ghosting for that specific trait.
Editing photos and videos and need a large, high quality screen that won't break the bank? Give the ASUS PB328Q a shot. Wanting to find a gaming monitor to take down Stormtroopers in Star Wars Battlefront. Take a look at any number of other options.