I would argue that they where tge first to try and do all that at once while on non-specified hardware systems. Yes Apple, Amiga etc will similar stuff but they at least had set target hardware.

Microsoft tried to do everything for better and worse on wildly varied commodity hardware.

The first one that pretty much anyone could use and was useful for them. We credit Apple for popularizing the GUI, too, even though they stole it from Xerox.