10 ms·

there are plentiful OLEDs in 4k with refresh rates from 100Hz to 480Hz. your problem is a small size problem. 15” is targeted more towards portable work monitor

• LoganDark 1mo ago
  that 4K monitor has touch and pen support too. and it was $300. you'd be hard-pressed to find such a thing for $3,000 and even then you wouldn't have high refresh rate