[citation][nom]g-unit1111[/nom]Ha ha ha ha... that is very true. Smart phones, tablets and smart TVs all have the same components as desktop PCs - graphics processors, CPUs, RAM, storage, and operating systems. The only difference being that you can't customize a tablet the way you can a desktop.[/citation]
There's a lot more difference than simply customization. The biggest difference is capability and compute power. Sure TV's, tablet's and phones all have those basic components, but so did PDA's back in the early 2000's and nobody claimed they were replacing PC's. The simple fact is that those devices simply aren't capable of the raw crunching ability of today's modern PC's. A tablet can't open up an Adobe Premiere project and encode a high quality video from it. A tablet isn't going to be able to make me a presentation quality Powerpoint slide show. A tablet isn't going to run today's PC games, period. A smartphone isn't going to be able to have instruments connected to it to record audio tracks to compose music.
Smartphones and tablets are casual devices aimed at casual users. They will never replace the PC for power users who depend on a large screen, keyboard and mouse, and a full fledged OS with no limitations.