Playing an "HD console" on a CRT isn't pointless, there's a lot more to great looking games than pixel count. There are occasionally issues with small text, but that's the developers issue.
What will be totally pointless is Blu-Ray, which is why I would gingerly ask, why not look at the 360 instead? It has all the same cross platform games (about 80-90% the same games) and has some fantastic exclusives and awesome online. In the mean time, you can save the money you would've spent on PS3 (~R2k) towards a nice HDTV. When you finally get one, if you still want a PS3, you can sell/trade in the 360, or better yet keep both.