Welcome back to flying!
I went through a similar 10-year no-PIC-time spell. The thing that really drew me back into flying was ForeFlight. No kidding, that has made the usefulness of flying so much greater. It enables me to easily monitor weather in a long-term sense ("how does it look for a trip next week") and also in a short-term aviation sense ("What's it look like tomorrow?).
WAAS GPS is available now. So if you are IFR or will be, it has created highly accurate GPS-only approaches with ILS-like vertical guidance. These didn't exist 15 years ago but they are popping up at all over the place, giving even podunk airports approaches that rival an ILS (not quite the same unless they install a fancy-pants approach lighting $y$tem).
Also just in terms of flight planning, chart management, aviation database, plates, references, synthetic vision, etc. it is truly a wealth of info in one place. I think you're going to enjoy flying more now than then thanks to electronic flight bags. Also, something we all pay for through taxes, ADS-B, which can now provide weather and traffic in the cockpit if you buy a receiver. The efficiency with which these apps allow you to process massive amounts of information is amazing.
Now... what's available? The top 3 tablet-based (mostly iPad) moving maps are, IMHO, ForeFlight, WingX, and Garmin Pilot. Each of these has the option to connect to a remote-mounted GPS and/or ADS-B receiver stuck on a window or on the glareshield or whatever. They are legal for use in the cockpit as a source of maps. Even airlines use them now under protocol.
The various feature sets are all pretty similar with slight differences in user interface. I have personally flown with WingX and Foreflight. I like both of these but I like ForeFlight a little more and use it exclusively (I do still have a WingX subscription). I use FF with a a Stratus 2 ADS-B receiver/WAAS GPS. In terms of
portable GPS/ADS-B receivers, ForeFlight ONLY plays with the various Stratus models and, so far, nothing else. WingX has more of an open concept and can talk to several different models of ADS-B/GPS. WingX also works on more tablet OSs than FF.
Also, AOPA has some info for folks getting back in. You may have seen this, but ICYMI:
http://www.aopa.org/Pilot-Resources/Getting-back-into-flying
OK enough for one post. Again, welcome back to flying!