Re: "then it may time to step into the wonderful of world of Linux."
"I've not seen a real gearing up of Linux (desktop) for the Enterprise."
Nor will you. There's no overriding direction and no ultimate authority to dictate such a drive.
It's just a question of momentum and motivation. Plus a bit of time.
The truth is that it Linux is already a better client than Windows in every real sense. It's cheaper, with more than adequate functionality. It's easier to maintain, deploy, configure. It has all the software most cubby-hole denizens will ever need - even Microsoft Office, now available in a handy cloud format. And it's available from multiple vendors - something that big purchasers prefer, in every other product category.
Of course, enterprises won't switch without a compelling reason. What we're seeing right now is a sort of 'super-cooling' of the desktop landscape. Soon it will need only some tiny nucleus to trigger a sudden phase-change.
Recall that at the start of the 1980s, "nobody ever got fired for buying IBM," yet by the end of the decade the company had completely departed the desktop. Apple and CP/M similarly ruled the office in the late 1970s, but were barely a factor ten years later. Today, the unshakeable Intel CPU stronghold is crumbling under the onslaught of cheaper, faster chips built by multiple vendors based on the ARM architecture. Such shifts are always "impossible" - until suddenly, in retrospect, they look inevitable.
We've already seen a few big Linux implementations. (I think Schleswig-Holstein is still going open-source, though they seem to flip-flop every other week.) Microsoft will continue to make the Windows desktop increasingly problematic. And the US (ably led by Trump) will continue to make US spyware-infested technology less attractive. (Especially in fiercely independent economies such as China and Russia.)
In the end, Linux won't need a corporate cheerleader - it will simply become the default commodity option. It's hard to see any other possible outcome. Microsoft was a capable steward for desktop computing in the 1990s. Today, the company has clearly given up any intent of playing that role. The only other plausible option is Linux.