I have solved the problem with this bar if you right-click the bar when it pops up it will go away its very useful! Now it won't annoy you as much!
I'll draw a comparison to setting the Taskbar to Auto-hide...
You, actually, can, but, do not need to Rt Clk the (APP) Exit Bar. If you just touch it & back off it disappears... until you touch the mouse/cursor to the Top Edge, again, which causes it to reappear... pretty much like a Taskbar on Auto-hide. You have raised a good point, though; it other words, it's only 'there' if & when you ask for it, want or need it. Poke it & back off & it's gone, until you poke @ the Top Edge, again to use it.
Cheers,
Drew
1st, in regard to or response the last entry in the thread which mentions Chrome. A bit baffled why a browser & the APPS Exit Bar (Exit Bar is its 'proper' name, btw) would be mentioned together. It exists only w/ APPs not, browsers.
Anyway, I have to add or modity what I had written above:
If you open an APP to full screen, initially, there's the wee bar. (w/out touching it in any way) If you sit still on the APP just for a brief moment, said bar disappears up into the Top Edge. Then as I wrote, (now) once you poke at the Top Edge the wee bar shows out, again (to use or not)
As I wrote, just 'banging' (my term ;)) in the Top Left Corner will put the APP away & show the Desktop, again.
This all said, I must admit it's a challenge to grasp the "annoyance & need or want to remove or defeat". It's tough to see the issue it causes or what harm it is. No worries, just trying to help, if possible.
Oh, I meant to repeat for Cameron (& others), he asked about Pinning,
"What I really wish that Microsoft would introduce the ability to pin live tiles to the desktop. That would be nice."
IF one Rt Clks on a Live Tile there is Pin to Taskbar. That pretty much does it since (now) those APPS can be Pinned to the Taskbar to which, there is access, just as much as if that item was on the Desktop (as an icon or shortcut). Plus, bonus now, the Taskbar is not only just on Desktop but, on Start & (All) Applications screens, as well.
Cheers,
Drew