As mymmryless said, you have to be coordinated. Do you play any other instruments?
But i guess if you are doing alright with rockband drums, maybe you will pick up real drums quickly.
I sometimes had trouble playing rockband/guitar hero drums because I was playing songs I knew how to play on real drums, so I'd try to play it differently and mess up lol.
I started playing guitars years ago, and I had a cousin that started playing drums. I could NOT play drums to save my life, no coordination, zero idea how to keep time and a beat. Fast forward a couple years, listening to music closer, and playing guitar more, I was able to slowly play drums. Long story short, I guess if you really want to learn you could do it. I think if you have a musical background, it might make it a little easier. I wish I had to kit to play...