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Display technology is not the limiting factor in resolution viability - remember that driving pixels is expensive for the whole system. A 4k at 120Hz panel take

Display technology is not the limiting factor in resolution viability - remember that driving pixels is expensive for the whole system. A 4k at 120Hz panel takes a ~30Gb/s of data to drive. For an 8k display, this is ~120Gb/s. That's a lot data, for which content needs to be continuously rendered, read from VRAM and sent over a link during scanout and finally processed by a fast enough display controller to update the pixels. High-end systems can do this, but for the resolutions to become the norm you need to be able to do this from a low-power media boxes and entry-level laptops. Only then will such displays become the norm and prices go down.

cubefox 3y ago
Sony uses screens with 3.840 x 1.644 pixel resolution and 120 Hz in their top level smartphones, so a laptop is probably able to do significantly more.
- arghwhat 3y ago
  Driving at that rate is either full hardware decoded video, or rendering at much lower resolution or refresh. Take an Xbox series X pulling some 200 watts as example - it can technically drive 4k@120, but most content won't render at that speed or resolution. Now look a power budget of 20W for a laptop, or singular watt for a phone.
  - cubefox 3y ago
    Gaming consoles do expensive 3D rendering. 2D must be much cheaper, otherwise the Sony phone couldn't do it.
    - arghwhat 3y ago
      That's not how really how rendering works - there is no 2d or 3d, just variable complexity. On that phone, some UI activities like simple scrolling in some apps might be able to fun at a full 120Hz. Many apps apps won't, and games will either dynamically render a much lower resolution to keep up (a common performance technique), or just render nowhere near 120Hz, with sub-60 being more likely. And that's at 4k. This thread is about higher resolutions. To give the same meh performance at 6k, the phone would have to be more than 2x as fast in every metric. At 8k, more than 4x as fast. All while staying within the same power envelope. That's a lot to ask for in a generational bump.
ilyt 3y ago
That's by far the cheapest part of it, decoding will eat more power and transistors than just few differential lines. Add few magnitues if you need to generate it in a video game
- arghwhat 3y ago
  Differential transceivers and high speed circuit design is not cheap before economy of scale kicks in for that particular unit, but the mention of throughput was not as much to denote the link as much as to denote the speed at which content must render, scan out and decode...

cubefox 3y ago

Sony uses screens with 3.840 x 1.644 pixel resolution and 120 Hz in their top level smartphones, so a laptop is probably able to do significantly more.

arghwhat 3y ago
Driving at that rate is either full hardware decoded video, or rendering at much lower resolution or refresh. Take an Xbox series X pulling some 200 watts as example - it can technically drive 4k@120, but most content won't render at that speed or resolution. Now look a power budget of 20W for a laptop, or singular watt for a phone.
- cubefox 3y ago
  Gaming consoles do expensive 3D rendering. 2D must be much cheaper, otherwise the Sony phone couldn't do it.
  - arghwhat 3y ago
    That's not how really how rendering works - there is no 2d or 3d, just variable complexity. On that phone, some UI activities like simple scrolling in some apps might be able to fun at a full 120Hz. Many apps apps won't, and games will either dynamically render a much lower resolution to keep up (a common performance technique), or just render nowhere near 120Hz, with sub-60 being more likely. And that's at 4k. This thread is about higher resolutions. To give the same meh performance at 6k, the phone would have to be more than 2x as fast in every metric. At 8k, more than 4x as fast. All while staying within the same power envelope. That's a lot to ask for in a generational bump.

ilyt 3y ago

That's by far the cheapest part of it, decoding will eat more power and transistors than just few differential lines. Add few magnitues if you need to generate it in a video game

arghwhat 3y ago
Differential transceivers and high speed circuit design is not cheap before economy of scale kicks in for that particular unit, but the mention of throughput was not as much to denote the link as much as to denote the speed at which content must render, scan out and decode...