Which adapter or special cable do you use for HDMI - mini-HDMI cable or MHL converter?
That's right, neither - it has a full HDMI socket, grab a spare and you're ready.
Which other tablets, before or since, offered a transreflective display option, so while outside, the brighter the sunlight, the better it looked and the longer the battery lasted?
While other e-ink displays were cruzing along at less than 3 fps and Androids were tying to get to 60, both the Adam LCD and transreflectives were rated at 65 fps.
Which other tablets, before or since, have featured a micro-USB, sd card slot and a *full-sized* USB port so you could just plug in your other USB peripherals without adapters?
Which other other tablets, before or since, have offered as many storage option?
Which was the first tablet to support 802.11n wifi?
Which others at the time had true GPS and a digital compass built-in?
And it had all that at its design completion nearly 3 years ago.
Toss in that rotating camera and how the speakers were positioned and yes, in my opinion, that's a stunning design.
No tablets offered today have all of those features.
Update the internals and the screen resolution and there wouldn't be anything out there right now to compete with it.
But - that's just my opinion and you own one.