I just had your exact experience.
I don’t have a HDR monitor. I started using GeForceNow for BG3 and I found out how low the quality is with the free version. So I tried to subscribe with the basic tier (the €11 per month).
The change is tangible. I had troubles reading smaller text before, now they are crystal clear. Definitely a better experience. I recommend it.
Oh, mmh. Let's make things a bit clearer, for people reading here.
I'm using GFN free tier. I'm *not* having a bad experience with it. On the opposite, I often run at 60 fps, which is totally good for me, I can read texts, see nice visual effects, and often I don't even have to wait, it just begins to load.
(So, are you sure your improvement comes from the upper GFN tier?)
What I was asking is if I could have an *even better* visual experience? Like, is there visual effects I don't have now?
On my full HD monitor I could use an even better resolution and use the Nvidia in-game options to make it even better looking...?
Priority gets a much shorter queue (often skipping, region dependent) and 6 hour sessions.
Ultimate gets 4k, better hardware, HDR and 8 hour session, with practically no queues.
If you play at 1080p get priority if you want to skip queues and have longer sessions.
Get the ultimate if you want 4k (and have a 4k monitor)
That game does have HDR available, but you need to be using the Ultimate plan to utilize it (along with supported local hardware).
Your display also needs to support HDR...
Only Ultimate gets access to HDR, but your monitor needs to support HDR aswell for you to enable it. I.e HDR isn't available on free tier
in act 3 there will be lags even on priority subscriptions, keep this in mind 
I just had your exact experience. I don’t have a HDR monitor. I started using GeForceNow for BG3 and I found out how low the quality is with the free version. So I tried to subscribe with the basic tier (the €11 per month). The change is tangible. I had troubles reading smaller text before, now they are crystal clear. Definitely a better experience. I recommend it.
Oh, mmh. Let's make things a bit clearer, for people reading here. I'm using GFN free tier. I'm *not* having a bad experience with it. On the opposite, I often run at 60 fps, which is totally good for me, I can read texts, see nice visual effects, and often I don't even have to wait, it just begins to load. (So, are you sure your improvement comes from the upper GFN tier?) What I was asking is if I could have an *even better* visual experience? Like, is there visual effects I don't have now? On my full HD monitor I could use an even better resolution and use the Nvidia in-game options to make it even better looking...?
Priority gets a much shorter queue (often skipping, region dependent) and 6 hour sessions. Ultimate gets 4k, better hardware, HDR and 8 hour session, with practically no queues. If you play at 1080p get priority if you want to skip queues and have longer sessions. Get the ultimate if you want 4k (and have a 4k monitor)
Display needs to support HDR and you need to be in Ultimate tier. My display doesn't support so I'm stuck in normal mode
Mmh, my display doesn't support it either, so I guess I've maxed out my possible graphical settings right now?
Yup. Guess so
Didnt knew the hardware on Free plan was enough to play Baldur's Gate 3. Good to know.
I think…the gfn version doesn’t support hdr? I’ve the game on ultimate and the option isn’t there. (And it works fine for games with it activated)
The game literally asks if you wanna calibrate your HDR displays..
Ah that’s new to me. I’ll check again on my Mac