I agree that Microsoft spent a lot of time living on its past successes, but that wasn't pre-2000, it was post-XP. Windows XP launched slowly and tepidly, with much anger by the public, but then it went on to sell a billion copies. When it was clear that XP was an unrivaled success...Microsoft languished. They took over 5 years to deliver Vista, which then turned out to be a complete trainwreck that didn't even have a fraction of the changes it was supposed to have, yet ran like a slug glued to sandpaper. They were in a great position with smartphones (still called pocketpc phones, of course, heh), but there they languished too, trying to cram the Windows desktop UI onto a tiny screen with a tiny stylus (which was sadly one of the best mobile OS's at the time).
But the failure of Vista (which still sold twice as many Macs as have EVER been sold) was a wakeup call for Microsoft, and they really did start turning things around. Windows 7 was a superb operating system that will continue to have a life for years to come. It fixed everything that was wrong with Vista, made performance a priority and Windows began to slim down. In turn, Windows 8 is smaller, lighter and faster than 7, while offering more features. When they introduced Windows phone 7, it was pretty clear they were taking the critically acclaimed but commercially floppy Zune UI design and making it into something different from the 30+ years of Apple/Microsoft's endless copying of Xerox Parc's UI. But watching them build out that operating system over the 2 years they sold it was something worth considering: as each new update added features, the OS became faster, not slower. It used less CPU power. It used less RAM. Revision after revision improved it, right up until the end of the line with WP 7.8. Try using an iPhone 3G with its last OS, iOS 4: it's a miserable, slow, broken experience. Now try using a Samsung Focus with its last OS, Windows Phone 7.8. It's super usable, it's faster than the same device 2 years earlier with the original OS build, and it's got way more features and a well refined UI. That's not failure--that's learning, that's changing direction, that's optimizing the way you build your products.
There's no denying that Surface and Surface Pro didn't sell as well as iPads. Surface didn't offer enough to justify the $500 pricepoint, and it took MONTHS for Microsoft to get around to communicating to people why the pro cost $900+ and was worth it (and as a Surface Pro owner who traded his MacBook pro to get a Surface Pro, I'll tell you--it's an excellent device that's harmed more by MS's bad communication than by anything wrong with the device itself).
With any luck, MS's messaging post-reorganization will improve. I sincerely hope they have a unified communications team who actually understands the products and is in charge of public facing information, because let's face it: they have made a cluster**** of their communication even when they were offering an excellent product.
Finally, we have to be honest here: Windows 8 tablets are not going anywhere any time soon, and neither are RT tablets. In fact, we already have several new devices announced, with great specs and finally some sensible pricing. That's going to make a difference. A lot of customers out there want a tablet but can't sacrifice the functionality of a laptop and can't afford both. With Windows 8.1 tablet hybrids, they won't *need* to sacrifice one or the other. That's the vision of where PC's are headed, and as the next couple of years progress, you're going to see more and more desktop AND laptop PC's that are tablets with desktop stands in the former case, and tablets with laptop docks in the latter. The more that evolution continues, the more dominant Windows tablets will become. It's only a matter of time and attrition.
Up to 2000 Microsoft built up an incredibly strong range of products. Since then they have been living on their past success. Compare Microsoft in 2000 and Apple in 2000. And then ask yourself: How come people are buying iPhones and not Windows Phones? Microsoft should have been the biggest seller of high end phones. If Apple could do it, why not the much bigger Microsoft? Total failure. How come people are buying iPods and not Zunes? How come people are buying iPads and not Surface tablets? Total, total failure.
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Except you are wrong. On several accounts. There are major advances in this chip that have nothing to do with RAM: Twice the number of registers. Twice the number of vector registers. Vector operations for double precision floating point. That alone makes it run faster. Lots of code is optimised for 64 bit, because years of MacOS X 64 bit optimisations can just be carried over. As an example of actual memory savings, the C++ standard library will not allocate memory for any strings up to 22 characters. NSNumber objects will usually not allocate any memory. Then there are built-in operations for cryptography, making encryption and decryption a lot faster.
Memory usage is 90% dictated by things where 64 bit doesn't produce any memory overhead, that is graphics, video, audio, text.