Apps- you can access many apps, such as Skype, Instagram, facebook and more to connect with others. 

Games- You can play many games on the xbox game store.

PCLinuxOS distribution and is vector based. It is designed to be run directly from a live DVD.

Features - Available in several different flavors, SuperGamer claims to be the "world’s first Dual Layer Live DVD". The most recent version, SuperGamer Supreme 2.5, can be downloaded as a 7.9 gigabyte ISO file, while some older versions can also be downloaded in smaller sizes.

As well as offering a wide selection of Linux native free games and shareware versions of commercial games, it also includes a wide selection of video carddrivers, including proprietary binary blob drivers from NVIDIA and ATI as well as a wide array of free software alternatives

Limitations - Find Yourself.

Features- multi-touch gestures,  the use of full-screen apps, Mission Control to get a quick glimpse at every application that's currently running, auto-save feature and VoiceOver feature allows visually impaired people to access their computers more easily. 

Limitations- no software compatibility, expensive operating system, more convenient for professional users.

Features - Multi user, Root user, Centralized application installation, Installed applications

Limitations -  no standard edition of Linux, not as popular as Windows,  Linux can be suitable for an individual user

Takes longer to update

for online gaming and stability above everything else. Also, it is a Linux based product so developers

do not have to take a lot of time to get comfortable with it.

Features- The operating system is open source so anyone can build on or adapt it. 

Steam OS allows users to develop their own features, if they're sufficiently skilled programmers.

People can play games from the OS.

Limitations- For starters, not all games on Steam are compatible with Linux. 

At the time of this writing, there are approximately 1,300 games available that work with Linux. 

In other words, this is the same number of games that works in SteamOS. Not a bad number,

but when you look at what that list consists of, you won’t see very many big hits — some, but not many. 

Siri- you can ask siri questions, it can also perform tasks, such as call people, play games and play music if asked.

Apps- you can access many apps, such as Skype, Instagram, facebook and more to connect with others. 

Games- You can play many games on the playstore

IOS 7 for example is available on the IPhone 4, but as it was already old technology when IOS 7 came out, it struggles to run the software, this makes the phone slow and difficult to use.

You are very limited to what you can change in IOS, as it is all set by apple, you can only do what apple allows you to do in the update, for example you cant delete apps like safari.

Desigin can be seen as less attractive as other operating systems.