Hi, I'm a Frog Eater, you know, people in west Europa, crippled with problems...
As Ray8 i'm asking...
"What are the benefits of W8 on W7 as general way of use for ordinary and industry people"
I know, my english language knowledge is bad !
Your English is fine, better than many born to the language.
From my point of view, you really won't get any significant benefit from going to Windows 8 if you have a Windows 7 system that is working fine. Windows 8 provides some underlying improvements to the OS core, but they are not things the average person will miss in Windows 7 (or even Windows XP).
One of the things Windows 8 does is integrate Windows Firewall with Microsoft Security Essentials (MSE), but if you've installed MSE in Windows 7, there's nothing extra to gain. There are some additions to the way that some programs display and the information they provide, like Task Manager and Windows Explorer, but nothing you cannot live without. Also, the 'Ribbon' menu is becoming more standardised across supplementary programs, but most people rarely use things like the Task Manager and the menu change isn't a big deal.
Some say Windows 8 is faster, but my experience is that there isn't any real difference when it's started up. Windows 8, on my system, actually takes a lot longer to boot up than Windows 7. Then there's the removal of the start button and the introduction of the start screen, and a general move away from the desktop. For many ordinary, and as you allude 'industry', people that is a significant and annoying change. Yes, you can adapt to it or install third party programs to bring back the Windows 7 user interface, but that's really not the point as to why many are critical of the forced change.
In a nutshell, the only real difference that most people will notice between Windows 7 and Windows 8, and dislike or not, is the user interface; performance in most cases is neither here nor there. If your Windows 7 system is not broken, don't try and fix it with Windows 8.