USB 3.0 is 10 times faster than USB 2.0, and everyone wants files to transfer faster and save time, so why not move on to USB 3.0???
The answer is a little more complicated than that. It involves timing, compatibility and cost issues.
Many factors affect the speed that your data transfers, and most people never saw 480Mb/s (60MB/s) out of their USB 2.0 hosts. USB 3.0 will likely not deliver the fast “theoretical” speeds they promise. Hey, we don’t always get everything we want! Improved bus architecture and a new feature called “stream protocol” and a lot of other nerdy things you don’t need to worry about along with file size and host speed are going to affect your true speed. Basically you can rest assured of at least a 3X speed increase, which as they say “ain’t bad”. Don’t set your sights on a 10X improvement and you won’t be disappointed.
Considering the cost increase of USB 3.0 (some peripherals are twice the price) you may find that USB 2.0 is just fine for right now. Like all new and hot items, you know the prices are going to come down. If however you just can’t wait, there are enough 3.0 devices and hosts on the market at this point that you can rest assured most of the bugs have been worked out, and you won’t get that buyer’s remorse of buying the first new car on the lot that turns out to be a lemon. USB 3.0 after a long delay (it was introduced in 2008!) is finally starting to show up in laptops and cameras and peripherals, and it will only become more so in the second half of 2012. They say that 3.0 may be the last version of USB, for a number of time to market reasons, but that alas is a topic for another day. For now, USB 3.0 is safe, it delivers much of what it promises (wish we could all say that!) and it is here today!