From what I’ve heard, many people do notice the non-laminated display. I mean, it’s not dealbreaker-level, but it is noticeable.
With the iPad Pro vs iPad… honestly, the iPad Pro is probably overkill for Infinite Flight. I’m sure @Chatta290 can atest to this. The iPad 2018 can run Infinite Flight on max settings perfectly well. iPad Pro 2018 is ~3x more powerful… so you can see how it can be getting more overkill.
Honestly… if you want an iPad PURELY for Infinite Flight, I would just get the iPad 2018 or wait for the 2019 baseline iPad. It’ll probably last you at least a year or 2 with Infinite Flight and for only $329 that’s not bad.
However… I can see an advantage getting the iPad Pro. Obviously, everything about it is better than the baseline iPad. And, with animated cockpits arriving (which take up a lot of processing power), getting the Pro might not be a bad idea if you want it to last 3-4+ years. Honestly, it’s up to you and if you really want the FaceID, laminated display and thin bezels of the Pro or are fine with getting the iPad 2018 purely for just enough power for Infinite Flight.
Now, with the storage space… I would recommend getting more than 32 GB because I’m sure Infinite Flight will start to take up more and more space as more aircraft are added. And, in general, for day-to-say use, 32GB probably isn’t enough. 64GB+ would be more reasonable.
In summary: is the A10 future proof? Kinda. The iPad itself will definitely last a couple more years, but for Infinite Flight, it’s days of running max settings might be numbered. The A12X is DEFINITELY future proof and will last you a long while. If you can easily afford throwing $1000 at the iPad Pro, go for it. If it’s more of a financial challenge… just go for the iPad 2018.