Get your hands on one
and you may change your mind and remote desktop works fine.
Don't know where you got your pricing from but Apple and MS Australia give you
$679 for 32GB with Touch cover
$640 for 32GB WiFi iPAd without keyboard
Seems like MS undercuts Apple even with a real cheap WiFi keyboard that won't have a touch pad. Once you add in Office, a real file system and Windows, the Apple is looking like the expensive toy I'm afraid.
Tried printers, USB sticks, mouse etc and all worked fine as RT has basic drivers for most devices. However, I'm pretty sure there may be some older pronters it may not support. What didn't work was my Telstra 4G modem as it doesn't seem to follow the WIndows RT 4G modem guidelines. Not really a problem as I'm upgrading my Windows Phone to 8 and will use the 4G phone as my wifi router (supports up to 5) for cellular conneciton. It also works fine with my existing Windows 7 phone, but is a little slower. And yes it wll connect to a Homegroup.