They can, and many are. I regularly fly a
<airplane geek speak>
Mooney 201 with a Garmin MX20 hooked up to a G430, which on the ground centers the airplane on the Jepp airport diagram ($$$ subscription required, of course), with an overlaid 120 degree compass rose
</airplane geek speak>
...which is to say there is a 6" LCD screen in the panel of the 4-seat single engine airplane I fly that does overlay a map of the airplane onto an airport taxiway and runway layout, and shows your heading on the same screen. Similar technology (but with a few extra zeroes on the end of the price tag) is available and was probably equipped on this relatively new jet. I'm sure one of the foci of the NTSB investigation is whether that technology was broken, given an erroneous readout, misprogrammed, or properly set up but ignored, and the reasons for whichever of the above is true.
Thanks. That's good to know.