Blazer1985 :
Because: 1- flagship phones are becoming bigger, a year ago 5.5" would have been a "phablet", today it is just an average phone. And I personally don't like that.
2- such high ppi are just marketing, you have no benefits but you surely have drawbacks, the screen will consume more battery along with the gpu that needs to handle that resolution (which is prohibitive even for desktop gpus). So while the average buyer is allowed to say "wooow" and buy that thing, we should be able to see pros and cons... Here pros are lacking.
4G LTE reduces battery life drastically, should we all stop using that too?
One thing you fail to realize is that even though processors, bandwidth, screen resolutions, and all those neat things that drain batteries continue to grow - so do battery's. Take the Samsung Galaxy S series from start to finish as an example:
SGS BATTERY Li-Ion 1500 mAh battery
Stand-by Up to 750 h (2G) / Up to 576 h (3G)
Talk time Up to 13 h 30 min (2G) / Up to 6 h 30 min (3G)
SGS2 BATTERY Li-Ion 1650 mAh battery
Stand-by Up to 710 h (2G) / Up to 610 h (3G)
Talk time Up to 18 h 20 min (2G) / Up to 8 h 40 min (3G)
SGS3 BATTERY Li-Ion 2100 mAh battery
Stand-by Up to 590 h (2G) / Up to 790 h (3G)
Talk time Up to 21 h 40 min (2G) / Up to 11 h 40 min (3G)
SGS4 BATTERY Li-Ion 2600 mAh battery
Stand-by (2G) / Up to 370 h (3G)
Talk time (2G) / Up to 17 h (3G)
Music play Up to 62 h
SGS5 BATTERY Li-Ion 2800 mAh battery
Stand-by Up to 390 h
Talk time Up to 21 h
Music play Up to 67 h
Seems like resolution and processor aren't effecting battery-life as much as you think it is. Not enough to warrant a stagnation in resolution and processing power anyway.