I use it for all of the above, and it works fine. There's a port of putty in the app store, I believe it runs about four bucks. When I'm out and about and have to get into my production systems, it works very well using the wifi connection sharing feature of the iPhone 4 that my company provides me, along with a SIGNIFICANTLY better onscreen keyboard for use with terminals. The price is pretty awesome, and as far as I know, there will in fact be more tablets coming; they actually have the hardware and my folks in that firm tell me that they're waiting to finish backporting BB10 to the tablets to release them.
The downside is that there aren't a great deal of ooh shiny apps in the app store. I'm seriously hoping that changes over the coming year; I really want there to be three or four viable options for mobile computing to prevent situations like the quintupling of OEM windows licence prices that happened after MSFT got control of the desktop.