"look at Linux, same mistake".
That statement makes it sound like there is one person or organisation in control of Linux who could fill that gap.
I'm sure that you realise that it's just not like that. Linus was interested in creating a UNIX clone, originally for his own use. He did not really have any ambitions for the desktop. It's true that someone like RedHat or Canonical could attempt to fill that gap, but most of the Open Source projects just don't have the resources to produce something on the scale of a full-blown office productivity suite.
The one realistic candidate, StartOffice, was a project that came from proprietary and commercial package that was offered for free, non-commercial use on various platforms after being re-written in C++. When Sun purchased the company, they forked StarOffice to create OpenOffice, which had some of the copyright-encumbered components removed (particularly the database component, which was IIRC a cut-down ADABAS implementation). Sun kept StarOffice on their product catalogue as a commercial product, but as time went on, they had difficulty committing serious resource to it's development.
And Oracle's purchase of Sun was the death knell for StarOffice, and a serious kink to the development of OpenOffice. Whether the fork to produce LibreOffice will be enough to kick-start attempts to make is a serious contender for deployment at Enterprise level (it's already perfectly capable for SOHO or most SME uses) remains to be seen.
If you have the odd few tens-of-million dollars (or more) to develop a new, compatible competitor for MS Office, I'm sure that the whole world would wish you well! I'm sure that there really is a niche for a cross-platform, commercial suite, but trying to play catch up with Microsoft will always be a difficult task. Maybe you should invest in Corel, and try to get WordPerfect and Quattro ported, but I suspect that even this would be a quite herculean task!