You can't possibly think that. You'd seriously like to carry around a bag of gadgets instead of one that does all well??? You do know your iPhone killed off the iPod right? Do you love spending 1k+ for an iPad and another 1K+ on a laptop? If so, you are the consumer Timmy loves. The rest of us would welcome one device.
The counterpoint to that is that I don’t think we can have one device that makes for a great Mac and a great iPad. As the surface pro has demonstrated, something has to give (in its case, it was an okay laptop with a broken hinge, and a subpar tablet).
I am okay with owning both an iPad and a MacBook if it means I have a great tablet when I want one, and a great laptop when I need one. If Apple can somehow merge the two together with no compromises, I am all for it. But for the moment at least, I don’t think it’s possible, and I don’t think installing macOS on an iPad is the panacea everyone is making it out to be either.