I already did about 6 months ago, and haven't been happier.
Photoshop, InDesign, Illustrator, and Lightroom all get used on a regular basis (for business
and pleasure), so I use enough of the suite to justify having it as such. I also need to keep it updated regularly enough to ensure complete compatibility with clients, vendors, and printers. $50/month is actually less than I previously used to spend on planned upgrades, and always having the latest version of *anything* in the Master Suite has been a great asset.
Obviously I'm all for the cloud, but I'd love to see Lightroom advance a bit to incorporate the basic Photoshop features like Photoshop LE used to have, and continue to be available as a stand-alone purchase.