Does it mean VisualStudio will run on Linux soon?
No. Visual Studio is not open source (although there is now a free Community edition), and "open source" doesn't mean "runs on Linux" anyway.
8 core 64 bit ARM chips with GPU built in are fairly common and 10 core chips already announced (Mediatek), with 16-48 core vaguely hinted at for servers by other vendors
A bit more than hinting: Cavium is selling 24-48 core ThunderX (ARMv8) chips. I think the first one shipped a month or two ago.
But what can they do to be more open than they already are
They can allow OEMs to install Google Play without requiring that they install the entire suite of Google apps and without preventing them from installing competing apps.
There have been allegations in the UK of voter intimidation after postal ballots became easy to obtain: people would require dependents to hand over their ballots, fill them all in, and post them back. Now, it may be that this didn't happen or wasn't statistically significant, but if people are not required to turn up and vote in such a way that they can't prove to someone else how they voted then there's the potential for doing this on a large scale.
Of course one solution would be to allow individuals to vote repeatedly but only count their last vote, though if you capture someone else's voting credentials then it's very easy to vote en mass with everyone's details at one second to the closing deadline...
Politics: A strife of interests masquerading as a contest of principles. The conduct of public affairs for private advantage. -- Ambrose Bierce