Xbox One

Change in input media just means you need another slot for the other input media. XBox One and XBox 360 run on completely different computer architectures, which means you need to build and support an XBox 360 emulator in x86. That's a lot of pineappleing work (and it may not be possible to get to a desirable performance level). Sony is only making it work by porting individual games over to x86.

Nintendo has done backwards compatibility in the past by emulating the previous generation on hardware that is fairly similar. The more complex stuff gets, the harder it is to do that. There's a reason why you can pretty flawlessly run every GBA or N64 game on PC, but you run into all sorts of problems with more recent consoles, and it's not that modern PCs don't have the specs to run those games.

You're really trying to justify this decision from a company who flaunts they spent a billion dollars to make a sh`itty VCR that is concerned more with controlling the consumer? I'd be more lenient bu this is a billion dollar company, who specializes in software for computers, this was because of lazyness not difficulty.