The first and foremost reason to get a Sony Xperia Play is because you need a phone for staying in touch with others. Now, if you purchase certain accessories for you iPod Touch, like a microphone, and download certain services like Skype, you'll be able to use it as a phone. Now, if you're looking for a device that was designed to be a phone in the first place without having all those features added as merely an afterthought, then you might just want to choose the device that was made to be a phone: Sony Xperia Play.
But when you're looking for entertainment, this is where comparison may begin to ensue. For example, if you're looking for music, you can pick any of these three devices for that, but the iPod Touch is perhaps the best choice for that when it comes to music. You are likely to get a similar or even greater experience on the Sony Xperia Play, but it will be cluttered with a number of additional activities that have nothing to do with making music. Similarly, the 3DS is for playing games.
There are several similarities and differences to possibly consider when deciding to purchase devices like the Sony Xperia Play, the iPod Touch, and the Nintendo 3DS. The system that is best for you will clearly depend on your needs, as well as on what you can afford to live without and what you absolutely must have in a package. If you decide to pursue the smart phone route, however, you will want to look into some of the many Sony Xperia Play accessories that are available for purchase.
Common examples include the charger, the Sony Xperia Play battery, and the Sony Xperia Play holster. An extra battery will give you more energy to do your music listening, gaming and more.
Having a charger is great to keep you gaming and listening to your music without having the battery drain so quickly. Finally, the holster is wonderful for helping you keep your phone close to you as you go about your day placing calls, watching videos, and browsing the internet.