It's interesting you ask. iCal had the option of 2-, 3-, or 4-day view, which I liked a lot. Also, I think iCal did much better job visually distinguishing the current day. But I'm also talking about the task management aspects that had been integrated into iCal. Sure, there's Reminders, but besides being a separate app, it is buggy (crashes a lot) and the ui/ux is nowhere close to what iCal offered.