Maybe they need better footage. Looks like your standard hack and slash. Wasn't dissing it, it is what it is. Don't go all fanboi on me.
What's different is how the game punishes and rewards your play and lets you play how you want:
-You can wear light or heavy armor, light armor lets you move faster and use less stamina, but you take more damage, and heavy armor makes you slow and use more stamina but you take less damage With heavy armor you can take more damage before your poise breaks where your character drops his guard.
-You can build your character as a full melee, full ranged, caster, or a mix and wear according armor or invest into the stats you want
-You can't just chug potions whenever or pause the game (lol skyrim combat), you get a limited amount of potions and there is a long animation involved, if you use a potion at the wrong time and get attacked you will lose it and gain nothing for making a mistake
-Everything in the game is blockable or dodgable, if you get hit it's because you messed up, bosses don't have a gimmick. The bosses are meant to be hard, if you die, it's your fault and you can learn from your mistakes. The game really punishes you for making mistakes.
-You have stamina, you use up stamina when you roll, block, attack or get hit. So you have time everything perfect, you cant just hack away and chug potions.
-If you die, you go back to the last bonfire you used (a check point throughout the world), all the enemies minus bosses respawn, you keep all your gear and world changes stay, but you drop all your souls where you died (the game currency for upgrades/armor), if you do not make the same mistake and run back to your body before you die again from screwing up, you simply pick up your lost souls, if you die again, you lose all your souls. And you can only replenish your potions at bonfires.
-The story and dialogue is meh, but the graphics and atmosphere are amazing
-There is a ton of gameplay time, I'm on my first play through, 55 hours in, got 2 more areas to clear I think so prob 60-70 hours of gameplay for first play through. Then you can play it on New game plus where you keep your character, but the game gets a lot harder. Or you can play a completely different playstyle
-The online is great, you can invade other people's games and kill them, taking their souls and ruining their day. They can do the same to you. You can summon players to help you with bosses you can't beat. You can leave notes on the ground giving tips to other players, which is the only way of communication in the game.
Theres other details that you will see if you ever play the game, but demon soul and dark souls are the best action RPGs i've ever played. People who don't play them are really missing out.