Switchable graphics do indeed suck. I returned a laptop because of it, despite being told specifically the model I ordered did not have Optimus hybrid graphics. But it's not unsolvable. It's problem with companies not supporting Linux. Nvidia just joined the Linux foundation and ways to accommodate switchable graphics are already being discussed. It rules out some of the newest hardware in the short term but I have no doubt it'll become a non-issue eventually.

>Linux won't be ready until you can download a file from the Internet, run it, and install it just with a couple clicks (and not "you need to set the 'exectuable' flag!" error).

The Software Center has long since solved that problem, as well things like apt links in pages and it's far better than what's available on Windows at the moment (download exe, allow exe to run, hopes it's not a virus/malware, manually update it often etc).

>Linux won't be ready until you never have to reconfigure the graphics driver from the command line upon boot.

For a lot of systems it's simply a matter of using the GUI in Ubuntu to check for and enable proprietary drivers. Again it's down to support from other companies and that appears to be growing.

>Linux won't be ready until you can run a system update and install a new program at the same time.

Installers can block each other on Windows as well. This point just seems like nit-picking.