Virtually all Bluetooth devices are vulnerable to a newly discovered attack

Ctrl-shift-enter to open as administrator! As a regular user you will then be taken to a login prompt and as an admin you will be taken to the secure desktop. Both are more difficult to automate using scripting.
Windows-r opens the run box. That is not a full-fledged terminal, but you can run a cmd or powershell from there.

To go more on-topic for a moment; Keyboards with Bluetooth are actually not that common. In some secured environments (security services, financial world,…) they are usually prohibited, in many companies excluded (or not standard) due to costs. Moreover, most wireless keyboards are not Bluetooth, but something similar (license costs avoided?) The discussion about whether they would be more secure is another story.

To me, this seems mainly a theoretical attack because you have to be relatively close to use this and you therefore have to know very well who your target should be. So a complex targeted attack….