Photoshop when? ;)
How reliable can this rumor be ? There were no developper from Microsoft at Fosdem as far as I know. At best, if it is true, someone heard it from a friend working at Microsoft. More likely, someone working at Microsoft (but not in the MS Office team) said to a friend that with Valve pushing Linux, they might consider porting MS Office to it if it is a success. And by the time the rumor reached Michael's hears, they had a native port on the way... I don't trust that at all.
Unless they are writing it from scratch with a whole new team... No. Ain't happening.
We have a number of people, myself included, who run Linux on their desktops (although not officially sanctioned by IT) since we develop for Linux. So we generally have to run a VM with Windows for Office, especially Outlook. That's a hassle I could live without.