Played with both.
I also own a Galaxy Tab, an HTC Desire, and have had the chance to play with many other tablets, besides.
Let me lay some truth on you here:
The Asus Transformer works as "just a tablet" when desired. IN this mode it delivers phenomenal battery life that meets or exceeds every single one of it's competitors. Then, you can attach it to the keyboard dock, extending the battery life from 9 hours to 16 (!), gain a keyboard and two USB ports in host mode. Now this is critical; it allows you to attach a real mouse and use external storage such as thumb drives.
What was just an Android tablet - good for /personal/ use such as being a personal media player - becomes a perfectly functional thin client for RDP work. Excepting it is light, hella portable and has SIXTEEN ****ING HOURS OF BATTERY LIFE.
Tablets like the Xoom, the Galaxy Tab or yes, even the iPad are nothing more than “an Archos that doesn’t suck.” The Asus Transformer bridges the gap between “personal media player with a browser and some bells on” and “a real, functional laptop.”
Sure, it doesn’t have Windows…but you don’t NEED windows. You just need a good RDP client. (Wyse PocketCloud works like a hot damn.) And it’s got SIXTEEN HOURS OF BATTERY LIFE. I can’t stress that enough.
It might not matter to you – but I spend my entire day away from a wall socket. I like to sit by the lake and write. I like to sit in the park and manage my servers. I like to go to the pub and do my research. I like to be on the go, moving from place to place and experiencing life as something other than three interesting stains on the ass end of a fabric coloured box.
The Asus transformer is the *first* device that I have ever encountered that truly and honestly gives me a shot at getting the amount of /work/ done in a day that I have to, whilst allowing me the freedom to enjoy the life that work is paying for.
So yes, the Transformer ruins the Xoom. It took the Galaxy tab out back and shot it. With a flare gun. It took one look at the iPad, laughed, and punted it’s ass into a low orbit just so that it could have the pleasure of watching the brief fireball it made on reentry.
It is not perfect. Not by a long shot. Nor is Asus – I have more than a few bones to pick with those bastards – but it is still the single most innovative, impressive and honest-to-god useful piece of consumer-level technology that I have personally had the pleasure to use in over twenty years.
I got to borrow one for a week. I am HOOKED. I can’t get my grubby little paws on a personal “mine, my precious” model quickly enough.
If you think I am an Asus shill or other such nonsense, then I tell you to go back and read my previous comments on this site. I’m not a shill for anyone. I’m a grumpy old curmudgeon who rarely has a nice word about anything or anyone to say. I bitch, moan, whine and complain about things all the time – and I could sit here all day long listing faults of even my precious Transformer.
That doesn’t change the fact that – in my personal opinion – this is the best bit of consumer gear to have come out in twenty years. For all of it’s flaws, all of it’s issues, the buggy OS, the shitty Asus support – and abominable website…it’s still better than anything the competition have to offer.
And damn it…I’ve wanted something like this since I was six years old.
So when I say something nice about a product; that's rare. When I /rave/ about a product, that's the time to sit up and take notice. If you haven't used a Transformer, then please...find someone who has one, and borrow it for a day or two.
If you can pry it out of the owner's hands.