Why would the experience be disappointing? Mouse vs touch support is the only real difference atm. Win tablet mode sucks because it didn’t run full windows. Arm win sucks as well in terms of virtualization etc. Apple killed it w Rosetta 2. I own a win rt and still works, but so limited. IMO MBA will go the way of the dodo in 2gens.
Design language, mostly. Touch works entirely different than a mouse cursor, click targets need to be considerably larger on a touch screen based device, contextual menus and drop down menus don’t make sense in a touch context, either. Plus, macOS is very much a legacy way of designing and structuring interactivity that doesn’t make sense on a device that doesn’t include a mouse by default. That’s the thing, an iPad bundled with a mouse is just a laptop with a virtual keyboard, while an iPad without a mouse by default is something else entirely. The iPad is increasingly a device that lets you use a keyboard, a mouse, a stylus, if it makes sense for your current task but not require you to carry them if you don’t need it for the task. Mac apps on iOS would require a mouse, they’re not designed for touch. If they were designed for touch, they would already be iPad apps. It seems what people on MacRumors seem to want is just a touch screen Mac (sans keyboard), but (despite liking Macs), I actually like that the iPad isn’t a Mac.