Although I don't like the fact Microsoft didn't make the Xbox One backwards compatible.
Honestly, that's not really a big issue. NES, SNES, Gamecube, Playstation, PS2, PS3, PS4; it's not that big of a deal and it's not like you're going to throw away your old system when you buy a new one. All it does is save space, but would you rather pay another $100 or so for backwards compatibility? When Sony removed BC from the PS3, the price dropped down by about that much (though I got one of the originals so I can still play the few PS2 titles I have, namely Persona 3 and 4)