BLU-RAY and Home Media Centers: How do they work ?

[Engage]

Hey guys, it seems like home media centers keep getting more popular. Devices like this: http://www.wdc.com/en/products/products.aspx?id=1270

These devices are great because all the user needs to do is plugin a 3TB USB drive and they have access to all of their content without getting out of their chair.

I've only bought a few movies on Blu-Ray discs so it's not an issue for me, but I keep seeing how users on here seem to have so much content on Blu-Ray disc so how do you balance having a home media center?

Thanks!