If you like the ZA signature look, the next 50/1.4 will satisfy, and on account of its FL it might even please a wider audience with great performance. Also, Sony realise they need to fill out the ZA range - still. And the a99 is the best excuse to release a good one. But imagine a hot 35/1.4...
Interesting in some reviews people are measuring the a99 against pro models from C/N, presumably so they can have a go at the 'features' that are more amateur oriented. Anything to knock a competitor I guess, but Sony are ahead of these narrow guys and realise the days of 'da pro DSLR' as flagship models for AA aspirants are closing and you need a broader audience, which brings broader interests, hence the neat little things like peaking, DRO, pano, horizon level, and even EVF...and a whole lot of custom functions.
My current a99 favourite is the shutter speed progress meter (one of five EVF setting groups), reminds me of the old time needle meters used for exposure in great old SLRs like the Min SRT-101. Graphics work better than numbers in many applications, like wrist watches, fuel gauges, etc.