If true, this is most certainly good news. I guess/hope Apple had a wake-up call. A better CPU and 64gb max memory is my guess on the changes.
Unfortunately, the meaningful changes most pros I speak with want—a true 10-12 hour battery, sd slot, full travel keyboard, all 4 full power USB-c ports, will not appear in this release, if ever.
Fingers crossed Apple is updating the MacBook and MacBook Air too. They are giving up too much competitive room by selling outdated technology at premium prices.
And of course, let's hope as part of this awaken at Apple, let's hope Apple is investing heavily in Mac software. Mac being a sub team of iOS software is a bad omen—just look at the mess that is preview.
But to conclude on a positive note, it's great Apple is doing an update so quickly. Sends a good message to market.