Fist i was afraid that I need to have high end machine but my two years old medium build PC can manage just fine even on ultra (thou it blurs sometimes). Game is absolutly amazing, characters are vivid, all voiced , main quest is epic but trully amaring are side quests that dont feel grindy at all. To complete game and 90% of sidequests on normal difficulty is about 100 hours of play. On top of that you will get hours of free roaming, sailing and so on. And yes your decision do matter here.
