KMS solved this. If it flickers in ubuntu, then they're not doing it right.... or you're using some horrid blob graphics driver. You should see the transitions in Fedora -- it FADES from plymouth into X.2) No flicker in video, switching to login screen, user switching and so on.
Why would you want to change resolutions? Make the game scale better and leave it at your panel's native resolution.3) No weird bugs when switching to and from full-screen apps in other resolutions then default (mostly games)
Doubt it. X really is NOT a CPU hog.4) Less CPU usage / more battery life
REALLY doubt it. X already starts pretty fast, the majority of your boot time is loading the kernel and all your services.... oh, and that terrible blob at the front that sucks up 20-ish seconds... the... BIOS.5) Faster system boot
So... when it fails you want it to just be completely unusable?6) Never boot to console as failover - at least for major consumer graphic chips Intel, NV, AMD.
Because there's only two places you can go.... graphical environment, or text console. If the GE fails and you reject the console, you are forced into limbo where nothing will ever do anything at all, and you'll be forced to SSH in to the machine... assuming that the network is working. That sound like a good plan to you? Didn't think so...