I have a ScanGauge on my Ecoboost. Yes, it shows boost; and also Horsepower. It does NOT, at this time, read out some of the things that I liked to read with my previous '05 5.4 though. Examples: transmission temp, computed torque, cylinder head temp. You can get a trans temp readout directly from the Ford information center though. Interestingly, I was never able to get the ScanGauge "dialed in" on MPG with the Eco. It did great with the 5.4 on mpg. Fortunately, the Ford information center does a GREAT job on mpg.
With regard to boost, it took me awhile to figure out why I was getting negative boost numbers. Answer (I think) engine not receiving boost and has the negative vacume. Push on the throttle and the number begins to climb toward positive territory. On our recent towing trip, I saw boost numbers around 9 PSI before it downshifted on a steeper hill. On level, depending on wind, it was running 2 to 5 pounds. Kick it down a gear and less boost was required.
I can't believe that the Ecoboost is not putting out these "lost" parameters. My guess is that the PIDs are different and that ScanGauge has not yet figured those out. I've been in contact with their engineer about it but have not had any luck getting the new PIDs.
I've found the ScanGauge to be extremely useful (and fun).
2012 F150 FX4 Ecoboost, 2016 Surveyor 274BHS
2003 Yamaha FJR1300, Demco Premiere Slider
1969 John Deere 1020, 1940 Ford 9N, 1948 Ford 8N
Jonsered 535, Can of WD-40, Duct Tape
Red Green coffee mugs