Well for me it is multitasking and gaming. While I do use my smart phone for a great deal it is severely limited in processing power, storage, and screen space. My desktop has dual i7 3.4ghz processers. 32 GB DDR4 RAM. 5 Samsung Electronics 870 EVO 2TB 2.5 Inch SATA III Internal SSD. Dual ZOTAC GeForce GTX 1080 AMP Extreme Core Edition 11GB GDDR5X 352-bit PCIe 3.0 VR Ready cards, 5 monitors 1 55in center and 4 32in stacked 2 on each side. I love my iPhone 13 Pro but it can't hold a candle to my desktop. I also have a KVM setup to hot-swap boxes I am working on. My phone can't do that. Not to mention that WOW, FFXIV, and Zenith the Last City look and run freaking awesome on my desktop. No phone MMO even comes close. But on the flip side my Desktop is BIG really freaking BIG! Not portable at all. I can remote in to clients comps with my phone. Watch movies, anime, and TV on my phone. Check email, make purchases, and have internet and hot spot almost anywhere I go. So I would say I prefer my phone for somethings and my desktop for others.