Does anyone besides me want a computer that runs multiple operating systems simultaneously?

We used to run VM on our Amdahl mainframes in the 70s with multiple "operating systems" under different virtual partitions. No big deal.  Very handy for debugging things that need to think they have different "native environments".

I use one operating system at a time. 

Mine can do it as well, although I don't have a need at the moment so I don't implement it.  Virtual machines are quite common.

UNIX?  You sure you don't mean Linux?  

I prefer using 1 operating, for 1 computer. I own several computers. I tried using UNIX, but I don't know how to use it. I prefer using Linux, and the latest version of Microsoft Windows. I do use older versions of Microsoft Windows too by the way.

No, it's not appealing to me what you can do, and no I don't want to do multi-booting with my computers, and no I don't want any help doing multi-booting with any of my computers.

Meh. There are PC cases capable of cramming 2 motherboards in there so it's like having 2 PCs in one box. I suppose it has its potential uses. It's at least nice to have the option available if you need it. 

There are some things Linux does better than Windows so it would be nice to have Linux on one and Windows on the other simultaneously. You could switch back and forth without having to restart the computer. You could have one doing background tasks while doing your primary work on the other. Maybe use one as some type of server (i.e. home automation, media server, VM, file server, voip, etc) and the other as your main pc. If you work from home you can use one strictly for work use and the other for personal use. Spouses could have a dual workstation setup where they each have their own computer but there's only one PC case with dual motherboards and multiple keyboard/video/mouse = slightly less clutter in the home office.

I personally don't know why anyone would need it or what they would even use it for but I'm sure they'd come up with plenty of creative uses for it. When the concept of computers was proposed people also scratched their heads in bewilderment. They wondered what they would ever use that for and look at us now!

Not only is there a computer in nearly every home but they're really pushing more than one of everything nowadays to sell more hardware (i.e. more than one computer in every home, multiple monitors, multiple hard drives with RAID, multiple graphics card, dual motherboards, dual CPU, multiple routers with mesh networking, etc.)

What would you use it for?  To consolidate your multiple machines into one?  Why are you asking us if it's appealing when you're the one who wants it?  Are you trying to sell more hardware / testing the market?

i have windows 7 and windows 10 but i have to pick one at boot time. 

Why would someone run 2 OS's simultaneously on the same device? Thats sounds dumb yo

No, it's just you!

It's nothing new. Programmers who need to test their programs in different OS's and environments have been doing that for the longest time. The best way to do it is to use virtual machines and hardware today has made it far more easier than ever. Using VM made it possible to run multiple OS's at the same time making testing easier and faster. Otherwise, if you installed the OS's in different partitions or drives then you can only boot and use one at a time.

I once had a PII with 7 OS's installed - 2 windows and 4 different flavors of Linux and DOS (does that even count?). It was mainly for instructional purposes - primarily to show that windows is not the only OS in existence. It became very useful for data recovery too for multiple file systems.

The only way you can have multiple operating Systems running simultaneously is Virtually.

I don't see the point.   You can have Multiple Operating Systems on Different Hard Drives and in the Boot menu you pick which one you want.  Or you have Multiple Computers.

What's all this for?