I have several PDAs, but i allways ended up in that i am missing keyboard (ok, i purchased one for ipaq, but it is not comfortable). But biggest disadvantage is, that PDAs doesnt run windows or linux. I mean real windows or real linux. Conversion of documents is not smooth and you gonna miss the applications you are using on desktop. I have run through all this, i mean, i have PDA with 640x480 and VGA output and USB for masstorage and keyboard, but those who tried that will confirm that it solves nothing.
Size: it fits to my jacket pocket. Not to shirt pocket, but PDA looks there weird and in pants i cannot sit with PDA in trausers. It fits to kidney-bag and any bagpack.
Letter recognition: it works. PDA never worked for me
Onscreen keyboard - on PDA it is joke, the transparent one on Q1 - i got used to it in less than a day, writing emails and my long docs.
Peripherals - it is XP, all works there. on PDA you have problem with even flashdrive, keyboard mouse - get desktop with plugin of USB hub
WIFI+ethernet - internet is ok on the screen, 640x480 on PDAs is too bad and you need alternate browser to use internet at least a bit, ethernet is perfect for moving of movies/large data
Disk - PDA have no disk, 4 GB compact flash for riduculous price i shoot in less than 30 minutes.
Applications - on PDA is all sofwtware paid, and all apps are BAD.
CF slot - i am photographer, so it is like a gift. PDA is even opening picture a 1.4 minute! I can control my camera over USB and it's application. I have now 7" preview before shooting. Photoshop!
Performance - IT IS FAST! As fast as subnotebook. Harddrive is not bad either benchmark will follow.
Multimedia - well 40 GB and embedded XP with Mediacenter interface and instant start (one position of power on button will go you to XP, other to media player), it is awesome in car.
Games:
http://desire-art.com/img/samsung.jpg
You simply can for those who care, on PDA you are lost. You got also great control (joystick on left side). Strategy games are perfect. Hell you can connect the monitor without cable adapter and with dedicated button switch resolution instantly and plugin the joystick over USB.
I might continue, but i simply sold my notebooks and now going to sell the PDAs because it is now all useless, at least for me.
Hdd benchmark, it is ok!:
http://desire-art.com/img/fkhq1hdd.png