DSLR gear is still heavy but the mirrorless cameras are a lot lighter.
Sony is pushing the tech on that at the moment.
But even the new traditional DSLRs are lighter than they used to be.
Though a large lens is not going to be light, ever.
To me, I like Sony stating that they want to make their version of a smart mirror less camera experience. Because it's Sony they won't do this, but I'd love to see them kill the Xperia's native camera app and just use the Google one. Then you dump all the money making features in the pro mode apps. It's not that I don't think the native camera app shouldn't be good, it just depends on the consumer focus.
For example, I love LG's manual mode. Everyone here knows this. I don't like their auto mode as much, even though the V50's is nice. Since I don't shoot as many life shots (people based moments), when I fire the camera up, I go into manual mode right away. But for those fewer times I want to do life shots quickly, I prefer the Pixel 3XL or the Mate 20 Pro. No camera on Android can give me both - nor can iOS.
So I like the idea of Sony splitting off both as I wished someone else did this. But the issue is focusing on really pushing the camera tech where someone like me wants that versatility of a great manual mode and a great auto mode on one device.