It's nothing you have to 'worry' about...if you want to do it, go for it, but you won't really see performance improvements or anything. It'll give you some more space, but it's not necessary. For absolute performance, people are probably getting a solid state drive for their OS, so they can boot up and load things quicker. In benchmarks, sure, it'll be faster, but for their price right now, I can't see it being worth it for the typical computer user.
And that 1TB will fill up faster than you think... I thought the same about my 2TB of space, now I've only got about 150GB free.
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