...Desktop PCs are dying out, they fallen out of popularity with the growth in laptop and handheld devices...
?
Desktops are dying? Where did you made this observation?
Sure, people are saying that desktops PC are dying but it is loooooooooongest death possible (like 20 years...).
Many people don't need any more "towers" under (on top of it or on the side) their desks, since there is plenty of "iMac" like solutions, super small PC, PC on the stick (if you are from MN you know what I mean

) etc. etc. and this kind of "boring PC" will die (or is dead today).
Today (and few years back) there is "new" trend in desktop PC's: computer CASE mods etc. Desktop PC is not only for power, but also for DIY mods, make it beautiful etc. thing... one reason why I use... Amiga (for sure not for it's best operating system ever made...or amazing software)
Don't tell me this is going to dye soon. There will be steady desire to make case mods, it is like car mods. It is only for few, but there is enough of this few to make it stable income for companies.
https://www.youtube.com/watch?v=lyjWXAY1n2Mhttps://www.youtube.com/watch?v=UBy9Mdo_2EABTW. Who on earth needs faster computers anymore? This is reason why desktops are dying. You can use 9 year old Core 2 Duo PC at home and it works GREAT! My CPU that is not that new anymore is like a hot knife in a butter on a hot day... even my old 680 GTX will do for next few years. If I want power to crunch some number, I go to my work server and get CPU time...