Wouldn't an upgrade to an IGZO display have a much more noticeable effect on day-to-day functionality than Broadwell or Skylake? There are already IGZO displays that would work with MBP's: http://www.sharp-world.com/corporate/news/130927.html. Why doesn't Apple use them?
The effect IGZO had on iPads was crazy - going from the first retina iPad to an iPad Air was night-and day, all due to the display. Lower power draw meant a smaller battery and thus a more compact and lighter design, and the same battery life even with a much faster processor. They run way cooler, but I don't know if that has anything to do with the display.
For the MBP, Broadwell is going to consume much less power as well, so if they went with an IGZO display they could move to a smaller battery, more compact and lighter design, and much more powerful processors without sacrificing battery life. A 4k display seems like overkill, but I'd still probably buy it
The effect IGZO had on iPads was crazy - going from the first retina iPad to an iPad Air was night-and day, all due to the display. Lower power draw meant a smaller battery and thus a more compact and lighter design, and the same battery life even with a much faster processor. They run way cooler, but I don't know if that has anything to do with the display.
For the MBP, Broadwell is going to consume much less power as well, so if they went with an IGZO display they could move to a smaller battery, more compact and lighter design, and much more powerful processors without sacrificing battery life. A 4k display seems like overkill, but I'd still probably buy it