I have an iPad 3, and it is pretty nice, I love the retina display, there are a lots of apps, my mom loves it for videochat with my family who lives out of the country, it is intuitive for older people, and the smooth performance, but it is only an entertainment device rather than an universal one, and then I saw the Surface and told myself: "Hell, Microsoft just hit the nail".
You see, with the surface, we will be able to get a mobile app ecosystem just as Google Play, or the Apple Appstore, and it will start growing because of WP7 and WP8, Angry Birds, Jetpack Joyride, Fruit Ninja, and many more casual apps but then, I told myself: "Heck, imagine, an i5? That is a powerhouse.".
If it at least has the Intel 4000 GPU, it will be a decent machine to play games such as Borderlands, Spore, WoW(and a wide variety of online games at high settings), even Starcraft, Diablo III and Skyrim(on mid-low, though) 100% ON THE GO. On the go. But then they tell us it has a Tegra GPU, that scales things up and widens the gaming posibilities.
And then we get all those legacy apps we love, like the Office Suite, WLM Client (If you have it, I don't use it), Torrents, Web Browsers, iTunes, Winamp, PHOTOSHOP, COREL, ILLUSTRATOR in a TOUCHSCREEN with a pen for more reliability! And it will work out of the box! No hassle in having to get a Wacom tablet or such.
And then BAM, the keyboard. It makes the keyboard really portable, unlike Asus, it is slim, and although I can get just fine with the one in the screen, I still prefer a physical one. And it works well as a cover.
Then I told to myself, dude, that is really cool, see, I make music from time to time, so using Ableton, Fruity Loops, and Propellerhead Reson will be a completely new experience, and I will be able to get two displays and a totally portable MIDI Controller interface, plus I will be able to emulate instruments such as the Novation Launchpad, Controller Interfaces, etc.
And since I am studying Programming and IT s, it will be a perfect device for using in my classes, I doubt in no time we will also get dual boot with Linux, even triple boot with a Hackintosh and OSX, an android port is obviously a must, and well, the iOS I am not really sure but it could happen(Look at projects such as iAtkos), and I'll be able to have a whole truly portable ecosystem in a tablet.
My conclussion: I'll get a gaming laptop such as the Asus G75(I don't really have the money for an Alienware, God, my last summer job gave me for a m11x and it is awesome), but for quick deployment in my clases and fast programming and workspaces that are not processor intensive such as Eclipse, Python, Dreamweaver, HTML5, etc, it will be perfect, besides, I'll get Linux and if I'm lucky Android and OSX too!!! It really has everything I could ask for, I only hope people realize it is a good alternative, because the teaser and showoff were also awesome.