The phrase you need to be concluding on is "general purpose computer". Tablets and Smartphones are, by design, NOT general purpose computers. The companies making and selling them do not want you to use them as you would use a PC. They want you to consume media, which they can charge you more money for, and then share that media with others so that they can in turn charge them as well.
PC is not redefined based on how people use their PC. Just because the majority of the people today who own a PC only use it for browsing webpages, listening to music, and watching video does not mean that any device that can do these things is now a PC.
I am not familiar with the defaults for Ubuntu's XFCE package, so I am unsure if they have some kind of composting engine configured that would be slowing it down. I was quite shocked to see that they found KDE to land higher benchmarks than XFCE.
Can I put a camera on the roof of my business to do this?
Can Starbucks or McDonalds put a camera on top of every store location and track vehicles nationwide?
What Does DNSChanger Do to My Computer?
DNSChanger malware causes a computer to use rogue DNS servers in one of two ways. First, it changes the computer’s DNS server settings to replace the ISP’s good DNS servers with rogue DNS servers operated by the criminal. Second, it attempts to access devices on the victim’s small office/home office (SOHO) network that run a dynamic host configuration protocol (DHCP) server (eg. a router or home gateway). The malware attempts to access these devices using common default usernames and passwords and, if successful, changes the DNS servers these devices use from the ISP’s good DNS servers to rogue DNS servers operated by the criminals. This is a change that may impact all computers on the SOHO network, even if those computers are not infected with the malware.