Parallel computing - Just hitting a key combination and switching to a totally different OS.
I know there are VM's, but the problem with a VM is that you have to use the hardware that is coded into the VM client, not any more. If they get this sorted you can have more than one OS booted and just hit a key combination to switch between the lot. No more dual booting, and it will be a genuine session, running of your full hardware. And they are almost there!
Point 2.
They have now recently released a kernel patch that allows you to apply kernel patches on the fly without rebooting your PC (
http://mybroadband.co.za/vb/showthread.php?t=182360), think Windows update without the need to reboot, ever.
Also, hot swapping has been around for a while now but some manufactures have taken it to new heights. You can even now hot swap a CPU without shutting down the server (multi CPU setups). So unless the PSU breaks down there is no need to reboot any more, 100% uptime.
The 64-bit compatibility. Until this day there is only a handful of software that really uses the 64-bit arch in say Windows, but Linux has taken this to the next level in the last 2 or so years.
You can, on a normal desktop PC, delegate certain tasks to one core of a CPU, set the load it should not exceed, etc. I have a couple of reports of guys having a full on GFX intensive gaming session on one core while the other core is doing some video encoding or compiling. Now that is impressive!
Shortly put, if the hardware vendors make a breakthrough, the Linux devs are there to see how they can implement it.
The problem with MS is that they want to be "King of the hill" in all regards, even hardware, dictating what they are willing to support and what they would like to see happen. This is going to cost them dearly in the near future.
Take HP/ProCurve for example. They have just released some open source servers, and by that I mean everything from hardware to software is open source. I cannot go into more detail but you should see the response they had on this, add on modules that are being created by other companies to enhance the servers, it is just scary!
Some more interesting stuff, no need for a CD to boot an ISO, Grub 2 can do it on the fly:
http://mybroadband.co.za/vb/showthread.php?t=185499
etc, etc.
I'm very excited, we are heading for some big things in the near future on Linux, keep an eye on the press!