You can in the newest SDK 3.0, as of like February 2017
For this exercise, you will need at least the tizen studio command line installed (I recommend the IDE anyway), the TV Extensions, your Tizen TV in 'Developer Mode' and you'll need to configure your development environment so you can package from the command line. (This won't work without certificates in place in some manner.)
Instructions for packaging from the command line can be found, thusly:
https://developer.tizen.org/development/tizen-studio/web-tools/cli
Look for 'tizen package'
Once you have that done, you can generate a .wgt file any way you want. I'll consider that 'done' at this point.
Find your TV's IP address and run...
<tizen_studio path>/tools/sdb connect <tv ip address>
Then you need its name
<tizen_studio path>/tools/sdb devices
You should see something like
<ip address>:<port> UN48E6300
From there, you can do:
<tizen studio path>/tools/ide/bin/tizen install -n <.wgt> -t <tv name>
for example:
<tizen studio path>/tools/ide/bin/tizen install -n somefile.wgt -t UN48E6300
Next up, it should take 4-5 seconds. If it completes immediately, your TV might not be in develop mode, you might not be connected, or your certs/profile.xml might be wrong. After 4-5 seconds, it will say 'install failed' every time, but your application will show up under My Apps.