And I've asked before. Why does anyone need more than 4 GB of RAM? I only have 512 MB of RAM yet I have 8 tabs open in Firefox and 5 other programs running and my system isn't crapping out on me at all.
The world really does not need 64 bit.
To try and answer your question there Kona. Some people use a lot of things besides browsers and/or the such now days. For the most part 64bit was really started in the server for more available performance at working with heavy loads. Then people started building games that needed lots of graphics and memory. Along with lots of speed to have all that work well together for a better gaming experience as such.
Lots of people want to think that more ram is better and such with a better speed for the cpu. But with these things goes the thing that the programs have to be designed to work correctly with such. There is nothing wrong with 32 bit and as for 64 bit... it is not what you or just everyone should be considering. Like you say "Why do I need it?" Well I can not answer that without knowing what you want from a computer. Like do you play games, have lots of data which needs room to be processed or even running a virtual OS. More than likely you do not and 64 bit would be a big step in a lot of stuff you do not need at the moment.
The point is Kona... it is there if you need it. Most of the new computers come 32 bit. But if you look at some... they are offering 64 bit OS. It really depends on you and what you need.
Myself I like having both for many reasons here. One my 32 bit runs fine for what I need it for. Then my 64 bit runs just about the same for what I use it for too. I really have very little to say as to what I preferr except that I use them both for what I have need for.
And yes my next computer I'm building is to be a 64 bit for a lot of reasons it will be used for.