For those still thinking between OLED vs IPS panels, I have a full review coming soon, here is a sneak peek of black colors on 4K LG Ultragear 32GQ950-B vs Alienware AW3423DW,
IPS vs OLED: What's the difference? - Tech Advisor
Display Comparison: OLED vs. IPS on Notebooks - NotebookCheck.net Reviews
IPS vs OLED: What's the difference? - Tech Advisor
OLED Vs IPS, Which Is Better
OLED Vs IPS, Which Is Better
QLED vs IPS Displays: Which Is Better For You? - Market Intuitive
LCD vs. LED vs. Mini LED vs. OLED: A quick guide | Ars Technica