Pico 4 has pancake lenses which are a huge upgrade. It's not just resolution that matters or even the type of panels, the lenses make a difference. Older Fresnel lenses have glare and blurring around the edges. Pancake lenses are clear across the entire lens.
As you've never had VR before then any modern headset will blow you away.
As you've never had VR before then any modern headset will blow you away.