Using an 8K TV as a Monitor

Original Article ↗ Hacker News Discussion ↗

Using large 4K and 8K TVs as computer monitors promises huge amounts of screen real estate at a lower price than multi‑monitor setups, but users report mixed results. Many praise the productivity boost and flexibility—especially when combined with tiling window managers—while others highlight serious drawbacks: neck and eye strain from oversized flat panels, suboptimal pixel density, imperfect text rendering, input lag, power consumption, and finicky OS/driver support. A recurring theme is that ergonomics, viewing distance, and workflow (single vs multiple monitors, window management, screen sharing) matter more than raw resolution, and that TVs’ “smart” features and privacy implications are additional trade‑offs to weigh.

Experiences with TVs as Monitors

  • Several people happily use 43–55" 4K TVs (and a few 8K) as primary monitors; others tried and reverted to ~27–32" monitors.
  • Reported issues: text at the edges hard to focus on when sitting close, especially on large flat panels; significant heat and higher power draw than typical monitors; sometimes noticeable input lag if “game/PC mode” isn’t enabled.
  • Some note mouse lag at 30 Hz or via under‑specced docks/cables; switching to 60–120 Hz and proper HDMI/DP adapters fixes it.
  • Smart TV UX, tracking, and “post‑processing” features are widely disliked; many disable all processing, never connect TVs to the internet, and use “game/PC mode.”

Resolution, Pixel Density, and Text Quality

  • Strong split between “1080p is fine” and “after 4K/HiDPI I can’t go back.”
  • 55–65" 8K TVs have ~135 PPI; some say that’s effectively “retina” at normal desk distances, others argue true retina is closer to 200+ PPI.
  • Cheap TVs with non‑RGB subpixels and some OLED/WRGB or non‑standard subpixel layouts can make text fringe and look bad; high PPI mitigates this but doesn’t always eliminate it.
  • Several people want smaller 8K (≈40–42") or 5K/6K monitors; current options (e.g., 27" 5K, 32" 6K/8K) are few and expensive.

Ergonomics and Health

  • Many find flat screens above ~30–32" uncomfortable up close; curved ultrawides (32–49") are often praised as more natural.
  • Others successfully use 48–65" TVs by placing them further away, lowering brightness, and focusing work near the center/bottom.
  • Neck pain from multi‑monitor setups is real for some and nonexistent for others; mounting angle and head position matter more than monitor count.
  • Conventional advice (top of screen at eye level) doesn’t work for everyone; several prefer eye level at mid‑screen and frequent posture changes.

Window Management and Screen Sharing

  • Big single displays require good window management: tiling WMs (i3/sway, yabai, AeroSpace), FancyZones, BetterTouchTool, Rectangle, etc. are heavily discussed.
  • Some value physical bezels as cognitive boundaries; others see bezels as pure distraction and love one continuous canvas.
  • Screen sharing is a recurring pain point with huge or ultrawide displays: shared views become too small. Workarounds include:
    • Sharing only one “virtual monitor” region.
    • OS tools that expose subregions as separate displays.
    • App‑level window sharing instead of whole‑screen sharing.

Hardware, OS Support, and Power Use

  • Modern GPUs (RTX 3000/4000, AMD 6000/7000) and HDMI 2.1 can drive 8K60 RGB; DP 1.4 with DSC and active adapters can also work.
  • On Linux, AMD’s open drivers are reportedly blocked from full HDMI 2.1 by licensing; Nvidia’s drivers support it.
  • macOS: recent Apple silicon with HDMI 2.1/Thunderbolt 5 can drive 8K or 4K120 cleanly; older Macs need adapters and EDID tweaking.
  • Power draw of 8K TVs is debated: one side claims 150–400 W “energy hogs,” others cite measurements around 130–140 W typical and compare favorably to car commutes or multiple 4K monitors.

Market, Cost, and Form Factors

  • TVs are repeatedly described as the best value per pixel; 55" 8K sets have been bought for under $1000–1400, while 32" 8K monitors cost similar or more and have quirks.
  • Some feel the monitor market is “broken”: either low‑end, low‑PPI panels or very expensive niche HiDPI options, with few mid‑size, high‑density choices (e.g., 40–42" 8K, 5K2K curved).
  • Non‑technical constraints matter: desk depth, stand/arm capacity, standing‑desk cost, and “spouse tolerance” all limit how big people can realistically go.