The FAQ says the following is on topic

computer hardware,
computer software, or
personal and home computer networking

and this is not

programming and software development,
video games or consoles,
websites or web services like Facebook, Twitter, and WordPress,
electronic devices, media players, cell phones or smart phones, except insofar as they interface with your computer,
issues specific to corporate IT support and networks,
asking for a shopping or product recommendation,

Cell phones and smart phones are mentioned explicity, but tablets are not.

Are tablets are on or off topic and does the OS matter?