Copy and paste from my reply on the last topic about this.
I've been playing the games through emulation for the last 7 or so years and while it's convenient there's a definite immersion trade-off when graphical glitches appear.
I'm sure someone has run the numbers from a marketing point of view and worked out what % of the potential player base will be new and put off by the game's (by today's standards) old fashioned graphics etc. and concluded that it's not a demographic they should pursue.
I think it's amazing these ports are even being released at all, from a costing point of view I think it makes a lot more sense for Sega to release an up-scaled port like this than to sink more money into a series which hasn't exactly been profitable for them.
I think it's important to bear in mind that Shenmue III isn't happening because of newcomers, it's the result of a passionate but relatively small fan-base that refused to stop asking about it and when presented with the opportunity to help donated generously.
Shenmue does not and will never have the biggest most commercially attractive audience, I wouldn't worry about what impact reviews of the re-release will have on the future of the series. Even an up-scaled port with a less desirable aspect ratio will give people a solid introduction to the series.
It has a lot going for it, name recognition as a (not so hidden) gem, it's available across a good number of platforms and is priced well. I certainly think it's a better accompaniment than Shenmue The Movie was when the second game got ported to the Xbox.