For all the hope that Elon Musk would address questions about the future of his electric-car company, Tesla Motors (NASDAQ:TSLA), or the solar-power utility he's an investor in, SolarCity (NASDAQ:SCTY.DL), his keynote speech at the annual South by Southwest conference over the weekend instead focused on SpaceX, the privately held maker of space-faring vehicles.

Musk waxed enthusiastic about his team's harrowing efforts to fix a malfunction that kept one of its Dragon capsules adrift on the way to the International Space Station. He also spoke of the need for human exploration of Mars, and SpaceX's most ambitious effort yet: to create a rocket capable of launching into space and returning, intact.

Even his biography spoke volumes. SXSW organizers listed him as "Elon Musk of SpaceX." What about Tesla? The carmaker was left for the underlying text, as if reaching for the stars were Musk's true love.

But should the company go public? The Motley Fool's Alison Southwick asks Tim Beyers of Motley Fool Rule Breakers and Motley Fool Supernova, who recently argued in favor of just such a plan, for his perspective in the following video. Please watch, and then leave a comment to let us know what you think.