Here is what I use on a day to day basis (updated : March 23, 2015):
I use a Dell Latitude 7440 Ultrabook running Windows 8.1 and this lightweight has enough battery life to last me a full day.
Dell All In One (AIO) running Windows 8.1 as my main system. Also use several Western Digital “MyBook” type network drives to backup my data.
My main tablet is an Apple iPad mini with 16 Gig RAM. My secondary tablet is a Google Nexus 7 (16 GB) tablet (wifi only)
Apple iPhone 6. Have developed a few apps for the Android platform and am looking to try my hand at developing iApps.
USB Memory Device
To ensure that my portable data is encrypted I use an Apricorn SecureKey, an Apricorn Secure Drive and IronKeys.
Apple IIe (vintage in excellent working condition)
I have a fully functional and mint condition Apple IIe computer along with dual disk drives, Apple mono monitor (green), and also have the full AppleWorks software, box and manuals. I used to service these systems (yes, at the chip level) years ago.
Data General One (vintage in excellent working condition)
Was fortunate to acquire a Data General One laptop with power supply and carrying case. Surprising the battery still functions. More to come on this vintage unit.