Just two questions:
What is the difference between IDE and ATA-6?
Is IDE an out-dated platform for hard drives?
So ATA-6 is a specific type of IDE drive, is that what you mean?
I wouldn't go as far as to call IDE "outdated", but if you have the option to use SATA interface (desktop scenario), that would be ideal. In a laptop, you really have no choice but to use whatever interface your current drive is. There's no reason to get a new laptop simply for having an IDE interface though if that's what you were getting at.