Difficulty and Length of Games..

Why does it seem like these day games just get harder and harder, is it because we are getting better and better and we need to stay entertained?  Games like Star Wars: The Force Unleashed when on their hardest difficulty I can barely take 6 steps before being shot into oblivion, yet they base so many of their achievements and unlockables on this difficulty.
 
Doesn't it also seem like games are getting longer but also shorter? That might not make sense to some but it means "They are getting longer but are keeping the player entertained for a much shorter time period. It might sound a little wierd for me to say this but I never finished Halo 3's campaign mode because I saw how much fun people were having in the Multiplayer, same goes for Gears 1 & 2, and Call of Duty 4 ( I tried to finish it but my friend wanted it back). 
 
So maybe it is better for games to be filled with content that only lasts 8-13 hours instead of 15-19. This may just be me talking randomly but this is what i feel its gonna come down to.

Why does it seem like these day games just get harder and harder, is it because we are getting better and better and we need to stay entertained?  Games like Star Wars: The Force Unleashed when on their hardest difficulty I can barely take 6 steps before being shot into oblivion, yet they base so many of their achievements and unlockables on this difficulty.
 
Doesn't it also seem like games are getting longer but also shorter? That might not make sense to some but it means "They are getting longer but are keeping the player entertained for a much shorter time period. It might sound a little wierd for me to say this but I never finished Halo 3's campaign mode because I saw how much fun people were having in the Multiplayer, same goes for Gears 1 & 2, and Call of Duty 4 ( I tried to finish it but my friend wanted it back). 
 
So maybe it is better for games to be filled with content that only lasts 8-13 hours instead of 15-19. This may just be me talking randomly but this is what i feel its gonna come down to.

many people think its the other way around..

Games are shorter now a days because of high development costs.

I tend to disagree. Difficulty is a whole lot more balanced these days -- and by that, I mean easier. It used to be a lot more acceptable years ago for games to be punishingly difficult, which is why developers dumbed down games like Ninja Gaiden II, Resident Evil 5 and Devil May Cry 4 from their predecessors.  Personally, I find this kind of unfortunate, as I enjoyed the immense challenge those games and others offered. They carried the same appeal as hot sauce. Something about playing 'hard mode' just doesn't feel the same as playing on easy and getting your ass kicked, but oh well.
 
I don't understand your first complaint. Force Unleashed is too hard on the hardest difficulty?

The only hard part on The Force Unleashed is that boss girl on the plant planet, the one that has a big ass monster in the back, and she keeps summoning henchmen, man. That pissed me off.
 
Let the topic continue.